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^ Ky DCERa 

mita 



Laser printer 






Eci 




OSYS 



SERVICE 
MANUAL 

Published in Dec. '01 
Revision 1.1 



Revision history 



Version 


Date 


Replaced pages 


Remarks 


1.0 


5-Dec-2001 


- 




1.1 


17-Dec-2001 


1-4, 1-5, 2-10, 2-20, 2-23, 3-3, 3-17, 
4-23, 4-26, 5-24, B-4, B-5, C-7 





^2 KyocERa 

miia 



Safety precautions 



This booklet provides safety warnings and precautions for our service personnel to ensure the safety of 
their customers, their machines as well as themselves during maintenance activities. Service personnel 
are advised to read this booklet carefully to familiarize themselves with the warnings and precautions 
described here before engaging in maintenance activities. 



Safety warnings and precautions 

Various symbols are used to protect our service personnel and customers from physical danger and 
to prevent damage to their property. These symbols are described below: 



^DANGER: High risk of serious bodily injury or deatli may result from insufficient attention to or incorrect 
compliance with warning messages using this symbol. 

^WARNING:Serious bodily injury or death may result from insufficient attention to or incorrect compliance 
with warning messages using this symbol. 

ACAUTION: Bodily injury or damage to property may result from insufficient attention to or incorrect 
compliance with warning messages using this symbol. 

Symbols 

The triangle (A) symbol indicates a warning including danger and caution. The specific point 
of attention is shown inside the symbol. 

/j\ General warning. 

/^\ Warning of risk of electric shock. 

Warning of high temperature. 

indicates a prohibited action. The specific prohibition is shown inside the symbol. 
r^vy General prohibited action. 





Disassembly prohibited. 

indicates that action is required. The specific action required is shown inside the symbol. 
AS General action required. 

Remove the power plug from the wall outlet. 

Always ground the printer. 




o 



1. Installation Precautions 

AWARNING 

• Do not use a power supply with a voltage other than that specified. Avoid multiple connections to 
one outlet: they may cause fire or electric shock. When using an extension cable, always check 
that it is adequate for the rated current 



' Connect the ground wire to a suitable grounding point. Not grounding the printer may cause fire or 
electric shock. Connecting the earth wire to an object not approved for the purpose may cause 
explosion or electric shock. Never connect the ground cable to any of the following: gas pipes, 
lightning rods, ground cables for telephone lines and water pipes or faucets not approved by the 
proper authorities 



^CAUTION: 

• Do not place the printer on an infirm or angled surface: the printer may tip over, causing injury. 

• Do not install the printer in a humid or dusty place. This may cause fire or electric shock 

• Do not install the printer near a radiator, heater, other heat source or near flammable material. 
This may cause fire 



' Allow sufficient space around the printer to allow the ventilation grills to keep the machine as cool 
as possible. Insufficient ventilation may cause heat buildup and poor copying performance 



' Always handle the machine by the correct locations when moving it 

' Always use anti-toppling and locking devices on printers so equipped. Failure to do this may 
cause the printer to move unexpectedly or topple, leading to injury 

' Avoid inhaling toner or developer excessively. Protect the eyes. If toner or developer is 
accidentally ingested, drink a lot of water to dilute it in the stomach and obtain medical attention 
immediately. If it gets into the eyes, rinse immediately with copious amounts of water and obtain 
medical attention 

' Advice customers that they must always follow the safety warnings and precautions in the 
printer's instruction handbook 












2. Precautions for Maintenance 

^WARNING 

• Always remove the power plug from the wall outlet before starting machine disassembly. 



' Always follow the procedures for maintenance described In the service manual and other related 
brochures 



• Under no circumstances attempt to bypass or disable safety features Including safety 
mechanisms and protective circuits 



'Always use parts having the correct specifications 

' Always use the thermostat or thermal fuse specified In the service manual or other related 
brochure when replacing them. Using a piece of wire, for example, could lead to fire or other 
serious accident 



• When the service manual or other serious brochure specifies a distance or gap for Installation of a 
part, always use the correct scale and measure carefully 



' Always check that the printer Is correctly connected to an outlet with a ground connection 

' Check that the power cable covering Is free of damage. Check that the power plug Is dust-free. If 
It Is dirty, clean It to remove the risk of fire or electric shock 



■ Never attempt to disassemble the optical unit In machines using lasers. Leaking laser light may 
damage eyesight 

■ Handle the charger sections with care. They are charged to high potentials and may cause 
electric shock If handled Improperly 



ACAUTION 

• Wear safe clothing. If wearing loose clothing or accessories such as ties, make sure they are 
safely secured so they will not be caught In rotating sections 









A 
A 



• Use utmost caution when working on a powered machine. Keep away from chains and belts 



' Handle the fixing section with care to avoid burns as It can be extremely hot. 



' Check that the fixing unit thermistor, heat and press rollers are clean. Dirt on them can cause 
abnormally high temperatures 



• Do not remove the ozone filter. If any, from the printer except for routine replacement. 







' Do not pull on the AC power cord or connector wires on high-voltage components when removing 
them; always hold the plug itself 



' Do not route the power cable where it may be stood on or trapped. If necessary, protect it with a 
cable cover or other appropriate item 



' Treat the ends of the wire carefully when installing a new charger wire to avoid electric leaks. 
' Remove toner completely from electronic components 

■ Run wire harnesses carefully so that wires will not be trapped or damaged 

' After maintenance, always check that all the parts, screws, connectors and wires that were 
removed, have been refitted correctly. Special attention should be paid to any forgotten 
connector, trapped wire and missing screws 

' Check that all the caution labels that should be present on the machine according to the 
instruction handbook are clean and not peeling. Replace with new ones if necessary 



' Handle greases and solvents with care by following the instructions below: 

■ Use only a small amount of solvent at a time, being careful not to spill. Wipe spills off completely. 
• Ventilate the room well while using grease or solvents. 

■ Allow applied solvents to evaporate completely before refitting the covers or turning the main 
switch on. 

■ Always wash hands afterwards. 

' Never dispose of toner or toner bottles in fire. Toner may cause sparks when exposed directly to 
fire in a furnace, etc 

' Should smoke be seen coming from the printer, remove the power plug from the wall outlet 
immediately 



3. Miscellaneous 

AWARNING 

• Never attempt to heat the drum or expose it to any organic solvents such as alcohol, other than 
the specified refiner; it may generate toxic gas 



A 












Contents 
Chapter 1 

1-1 Printer specifications 1-3 

1-2 Names of parts 1-9 

1-3 Safety information 1-10 

1-4 Environmental requirements 1-13 

1-5 About the toner container 1-17 

Chapter 2 

2-1 Unpadding 2-3 

2-2 Installing the printer 2-5 

2-3 Using the operator panel 2-17 

Chapter 3 

3-1 Maintenance/Adjustments 3-3 

Chapter 4 

4-1 Electrophotographic system 4-3 

4-2 Paper feeding system 4-18 

4-3 Electrical control system 4-23 

Chapter 5 

5-1 General instructions 5-3 

5-2 Disassembly 5-4 

Chapter 6 

6-1 Troubleshooting 6-4 

Appendix A 

Timing charts A-4 

Wiring diagram A-9 

Appendix B 

status page B-3 

Appendix C 

Parallel interface C-3 

USB interface C-6 

Serial interface (option) C-7 



Chapter 1 Product Information 



Chapter 1 Contents 



1-1 Printer specifications 1-3 

1-1-1 Specifications 1-3 

(1) Engine 1-3 

(2) Controller 1-4 

(3) Weight and dimensions 1-4 

(4) Power requirements 1-5 

(5) Environmental requirements 1-5 

1-1-2 Available option memory/device 1-6 

(1) Expansion memory (DIMM) 1-6 

(2) Memory card (CompactFlash) 1-7 

(3) Hard disk (Microdrive) 1-8 

1-2 Names of parts 1-9 

1-2-1 Names of parts 1-9 

1-3 Safety information 1-10 

1-3-1 Safety information 1-10 

(1) Laser caution label on the scanner unit 1-10 

(2) Ozone concentration 1-11 

(3) ISO 7779 1-11 

(4) CE marking directive 1-1 1 

(5) Declaration of conformity (Australia) 1-1 1 

1-4 Environmental requirements 1-12 

1-4-1 Environmental conditions 1-13 

(1) Clearance 1-13 

(2) Places to avoid 1-14 

(3) Note on power 1-15 

(4) Removing the printer 1-15 

1-5 About the toner container 1-16 

1-5-1 Toner container 1-17 

(1) Toner container handling 1-17 

(2) Toner container storage 1-17 



1-1 Printer specifications 



1-1-1 Specifications 



(1) Engine 



Item 


Description 


Print method 


Electrophotography laser scan 


Print speed (when printing 
multiple pages) 


18 pages/min. (A4) 

19 pages/min. (Letter) 


Resolution 


Fast 1200 mode with KIR 
600 dpi with KIR 
300 dpi with KIR 


Smoothing 


KIR (Kyocera Image Refinement) 


First print (A4 or letter, 23 °C), 
depends on input data 


Approximately 19 seconds or less 


Warm-up time 
(23 °C ) 


Power on: 
Sleeping: 


16 seconds or less 
9 seconds or less 


Maximum duty cycle (A4) 


65,000 pages/month (Average: 4,000 pages/month) 


Machine life expectancy 


300,000 pages of printing or 5 years 
(expandable to 900,000 pages of printing using MK kits) 


Development 


Mono component dry developer 


Laser 


Visible laser (Semiconductor laser) 


Main charger 


Scorotron plus charging 


Transferring 


Negative charger roller 


Separation 


Curvature separation 


Drum cleaning 


Blade 


Drum discharging 


Eraser lamp (LED array) 


Fuser 


Heat roller and press roller 


Paper 


Plain paper 


Capacity of paper 
(80g/m2[0.11mm 


'eed source 
thickness]) 


Cassette: 500 sheets, 
MP tray: 100 sheets 


Capacity of output trays 

(80 g/m^ [0.11 mm thickness]) 


Face-up: 250 sheets [Option face-up tray PT-4] 

100 sheets [Option face-up tray PT-60] 
Face-down: 250 sheets 



FS-1900 



1-3 



(2) Controller 



Item 


Description 


CPU 


PowerPC405GF/200MHz 


System ROM 


4 MB Mask (or Flash) DIMM 


Font ROM 


2MB 


Main (Video) RAM 


16MB 


Expanding RAM Maximum: 

Slot: 
DIMM size: 


144 MB (Including the standard 16 MB main RAM) 

1 DIMM slot 

Accepts any of 16/ 32/ 64/ 128 MB DIMM 


Memory card (Optional) 


CompactFlash 


Hard disk (Optional) 


Microdrive (340 MB/ 512 MB/ 1 GB) 


Host interface Parallel: 

USB: 

KUIO-LV[3.3V]: 

Serial: 


High-speed, bidirectional (IEEE1284) 

Revision 1.1 standards 

Optional network interface card IB-21: 10/100 Base-TX 

Optional serial interface board IB-lOE : RS-232C, Maximum 

speed: 115.2 Kbps 


Page description language 


Prescribe 


Standard emulation modes 


PCL6, Diablo 630, IBM proprinter X24E, Epson LQ850, Line 
printer, KPDL 



(3) Weight and dimensions 



Item 


Description 


Main unit 


Width: 


34.5 cm (13-9/16 inches) 


(excluding 


Height: 


30.0 cm (11-13/16 inches) 


protrusions) 


Depth: 


39.0 cm (18-1/4 inches) 




Weight: 


13 Kg (28-5/8 lb.) 



( ): U.S.A 



FS-1900 



1-4 



(4) Power requirements 



Item 


Description 


Voltage/current 


220 - 240 V AC ±10 %, 50/60 Hz ±2 %/3.6 A 
(European countries) 




120 V AC ±10 %, 60 Hz ±2 %/7.2 A (U.S. A/Canada) 


Watts Maximum: 

Standby (Ready): 

Sleeping: 


961 W 
15 W 
12 W 



(5) Environmental requirements 



Item 


Description 


Operating temperature and 
humidity 


10 to 32.5 °C (50 to 90.5 °F), 20 to 80 %RH 


Maximum altitude 


2,000 m (6,500 feet) 


Noise emission (Excluding 
peaks, measured at 1 m from 
printer, as per IS07779) 


Maximum: 53 dB(A) 
Standby: 35 dB(A) 



FS-1900 



1-5 



1-1-2 Available option memory/device 
(1) Expansion memory (DIMM) 

The following option memory DIMMs are available for use with the printer. For more informations 
about DIMM, refer to Section 2-2-3 Expanding the memory (DIMM) on page 2-10. 



NOTE 



Availability of the following memory DIMMs, manufacturers, and 
specifications may change without notice. No responsibility is assumed by 
Kyocera Mita with respect to loss or damage caused by the use of these 
DIMMs. Only the following DIMMs are certified the for use with the printer. 



Manufacturer 


Capacity 


Model 


Melco Inc. 


16MB 


PM-HP-16M-KC 




32MB 


PM-HP-32M-KC 




64MB 


PM-HP-64M-KC 




128MB 


PM-HP-128M-KC 



FS-1900 



1-6 



(2) Memory card (CompactFlash) 

The following memory cards are available for use with the printer. Do not insert or remove a 
memory card (CompactFlash) while power is on. If the memory card is removed while the printer 
is on, damage could result in the printer's electronics or the memory card. Refer to Section Installing 
the option memory card (CompactFlash) on page 2-15. 



NOTE 



Availability of the following memory cards (CompactFlash), manufacturers, 
and specifications may change without notice. No responsibility is assumed by 
kyocera Mita with respect to loss or damage caused by the use of these 
memory card. 



Manufacturer 


Capacity 


Model 


SanDisk 


8MB 


SDCFBS-8-101 




16MB 


SDCFBS-16-101 




24 MB 


SDCFBS-24-101 




32MB 


SDCFBS-32-101 




48 MB 


SDCFBS-48-101 




64MB 


SDCFBS-64-101 




96 MB 


SDCFBS-96-101 


Viking 


4MB 


CF4M 




8MB 


CF8M 




12 MB 


CF12M 




16MB 


CF16M 




24 MB 


CF24M 




32MB 


CF32M 




48 MB 


CF48M 




64MB 


CF64M 




80 MB 


CF80M 


Kingston 


8MB 


CF/8 




16MB 


CF/16 




24 MB 


CF/24 




32MB 


CF/32 




48 MB 


CF/48 




64MB 


CF/64 




96 MB 


CF/96 



1-7 



FS-1900 



Manufacturer 


Capacity 


Model 


DelkinDevices Inc. 


8MB 


DDCFFLS2-008 




16MB 


DDCFFLS2-016 




24 MB 


DDCFFLS2-024 




32MB 


DDCFFLS2-032 




48 MB 


DDCFFLS2-048 




64MB 


DDCFFLS2-064 




96 MB 


DDCFFLS2-096 


HITACHI 


8MB 


HB286008C4 




16MB 


HB286016C4 




32MB 


HB289032C4 




48 MB 


HB289048C4 




64MB 


HB288064C5 


Transcend 


4MB 


TS4MFLASHCP 




8MB 


TS8MFLASHCP 




16MB 


TS16MFLASHCP 




32MB 


TS32MFLASHCP 


SST 


8MB 


SST48CF008 




16MB 


SST48CF016 




24 MB 


SST48CF024 




32MB 


SST48CF032 




48 MB 


SST48CF048 




64MB 


SST48CF064 




96 MB 


SST48CF096 


LEXAR Media 


16MB 


- 




32MB 


- 




48 MB 


- 




64MB 


- 




80 MB 


- 



(3) Hard disk (Microdrive) 

The following hard disk is available for the printer: 



Manufacturer 


Capacity 


Model 


IBM 


340 MB 

512MB 

1 GB 


DMDM- 10340 
DSCM-10512 
DSCM- 11000 



FS-1900 



1-8 



1-2 Names of parts 



1-2-1 Names of parts 




(?) Top cover 

(2) Toner container 

(3) Operator panel 

(4) Paper gauge 

(5) Paper cassette 

(e) Paper size window 
(7) Power switch 
(a) Paper size dial 
(9) Waste toner box 
@ Left cover 



@ Charger Cleaning knob 



@ Paper stopper 

@ Face-down output tray 

@ Memory card slot 

@ Paper transfer unit 

@ Paper transfer unit release lever 

@ MP tray 

@ Rear cover 



©" 



@ AC inlet 

@) Parallel interface connector 
@ USB interface connector 
(§) Option unit connector 
@) Network interface card (option) 
or serial interface board (option) 



Figure 1-2-1 Name of parts 



FS-1900 



1-9 



1-3 Safety information 

1-3-1 Safety information 

(1) Laser caution label on the scanner unit 

The laser scanner unit inside the printer has the following label affixed on its top. Observe the laser 
radiation warning and figures when handling the laser scanner unit. 



WARNING 



A 



Use of controls or adjustments or performance of procedures other than those 
specified herein may result in hazardous radiation exposure. 



This label is affixed atop of the laser scanner unit inside the printer. 



European countries 



FS-1900 220-240V~ 
50/60HZ 3.6A 
KYOCERA CORPORATION 

MADE IN JAPAN 

CLASS 1 LASER PRODUCT TO IEC825 
LASER KLASSE 1 NACH IECS25 
KLASSE 1 LASER PRODUKT LHJ. IEC825 
LUOKAN 1 LASERLAITE 



Qfm\ 4- 



Rheinland \^ 




CAUTION 

REMOVE POWER < 
AND FUSE REPLA' 

VORSICHT 



C€ C 



ATTENTION 

POUR PREVENIR LES CHOCS 
ELECTRIQUES, COUPER L'ALIMENTATION 
AVANT DE REMPLACER LE FUSIBLE. 

ATENCION 

DESENCHUFE EL CORDON 

DE ALIMENTACION ANTES DEL SERVICIO Y 

DEL REEMPLAZO DEL FUSIBLE. 

PRECAUZIONE 

PRIMA Dl CAMBIARE I FIESIBILI O 

Dl ESEGUIRE RIPARAZIONI, 

STACCATE IL CADO Dl ALIMENTAZIONE. 



U.S.A/Canada 



FS-1900 isov-^ 

60Hz 7.2A 
KYOCERA CORPORATION 

MIE PLANT TAMAKI BLOCK 
704-19 NOJINO, TAMAKI-TOWN 
WATARAI-COUNTY, MIE-PREF, JAPAN 
MANUFACTURED: 



THIS LASER PRODUCT CONFORMS TO THE APPLICABLE 
REQUIREMENTS DF FEDERAL REGULATIONS 21 CFR 



4^-:^ 



CHAPTER 1, SUBCHAPTER J. 

Cl^ Tested Td Cciniply /. ^m^T^''? 

P£. W.1hFCCSUmd.rds ^^"^7y^< 

FOR HOME OR OFFICE USE 

UL1950 
US LISTED 

This device CDmplJeswJtli Part 15 of the FCC Rules. 
Operation is subject to the following two 
conditions: (1) This device may not cause harmful 
interference, and (2) this device must accept any 
interference recEived. including interference that 

This Class B digital apparatus complies 

with Canadian ICES-003, 



appar 



irique 



est 



conforme a la norme MMB-003 du Car 

CAUTION 

REMOVE POWER CORD BEFORE SERVICE 
AND FUSE REPLACEMENT. 

ATTENTION 

POUR PREVENIR LES CHOCS 
ELECTRIQUES, COUPER L ALIMENTATION 
AVANT DE REMPLACER LE FUSIBLE. 

PRECAUZIONE 

PRIMA Dl CAMBIARE I FIESIBILI O 
Dl ESEGUIRE RIPARAZIONI, 



DANGER 

ATTENTION 

VORSICHT 

ATTENZIONE 

PRECAUCION 

VARO! 




LASER RADIATION WHEN OPEN. 
AVOID DIRECT EXPOSURE TO BEAM. 

RAYONNEMENT LASER EN GAS D'OUVERTURE. 
EXPOSITION DANGEREUSE AU FAISCEAU. 

LASERSTRAHLUNG, WENN ABDECKUNG GEOFFNET. 
NIGHT DEM STRAHL AUSSETZEN. 

RADIAZIONE LASER IN CASO Dl APERTURA. 
EVITARE L'ESPOSIZIONE AL FASCIO. 

RADIACIONE LASER CUANDO SE ABRE. 
EVITAR EXPONERSE AL RAYO. 

AVATTAESSA OLET ALTTIINA LASERSATEILYLLE. 
ALA KATSO SATEESEEN. 

u-+c"-*cs e.*nfti.>J:7i;LT<f;'Su„ 
•i*iaiSI+»W4=. sf^M«*TP)BKT. 




(A 



,. CAUTION ACHTUNG ATTENTION ATENCION ATTENZIONE -, o -^ r.. «.^«: 

!\ HOT SURFACE HEISSE OBERFLACHE TEMPERATURE ELEVEE EXTERIOR CALIENTE SUPERFICIE CHE SCOTTA jl lE ^ 21 ra^mjiSl 

I_i AVOID CONTACT NICHT BERUHREN NE PASTOUCHER EVITE EL CONTACTO NON TOCCARE 



Figure 1-3-1 Caution labels 



FS-1900 



1-10 



(2) Ozone concentration 

The printers generate ozone gas (O^) which may concentrate in the place of installation and cause 
an unpleasant smell. To minimize concentration of ozone gas to less than 0.1 ppm, we recommend 
you not to install the printer in a confined area where ventilation is blocked. 

(3) ISO 7779 

Maschinenlarminformationsverordnung 3. GSGV, 18.01.1991: Derhochste Schalldruckpegel betragt 
70 dB(A) Oder weniger gemaB ISO 7779. 

(4) CE marking directive 

According to Council Directive 89/336/EEC and 73/23/EEC 

Manufacturer's name: Kyocera Corporation, Mie Plant Tamaki Block. 

Manufacturer's address: 704-19 Nojino, Tamaki-Cho, Watarai-Gun, Mie-Ken 519-0497, Japan 

declares that the product 

Product name: Page Printer 

Model number: FS-1900 (as tested with the enhancement optional unit: PF-60, DU-60, and SO-60) 

Conforms to the following product specifications. 
EN 55 022:1998 Class B 
EN 61 000-3-2:1995 
EN 61 000-3-3:1995 
EN 55 024:1998 

EN 60 950:1992 (-i-Al-i-A2-i-A3-i-A4-i-All) 
EN60 825-l:1994-i-All 

The manufacturer and its merchandising companies retain the following technical documentation 
in anticipation of the inspection that may be conducted by the authorities concerned. 

User's instruction that conforms to the applicable specifications 
Technical drawings 

Descriptions of the procedures that guarantee the conformity 
Other technical information 

(5) Declaration of conformity (Australia) 



FS-1900 
1-11 



Manufacturer's name: Kyocera Corporation, Printer Division 

Manufacturer's address: 2-14-9 Tamagawadai, Setagaya Ward, Tokyo 158-8610, Japan 

declares that the product 

Product name: Page printer 

Model number: FS-1900 (as tested with the enhancement optional units: PF-60, DU-60, and SO- 

60) 

Description of device: This page printer model FS-1900 is the 18 ppm; A4 size and utilized plane 
paper; laser; dry toner etc. The printer can be equipped with several enhancement optional units as 
a paper feeder as PF-60, a duplexer as DU-60, a sorter as SO-60 etc. 

Conforms to the following product specifications. 

AS/NZS 3548: 1995 (EN 55 022:1994 Class B) 
IEC60950 (EN 60 950:1992-i-Al-i-A2-i-A3-i-A4-i-All) 
IEC60825-1 (EN 60 825-l:1994-i-All) 

The manufacturer and its merchandising companies retain the following technical documentation 
in anticipation of the inspection that may be conducted by the authorities concerned. 

User's instruction that conforms to the applicable specifications 
Technical drawings 

Descriptions of the procedures that guarantee the conformity 
Other technical information 

Kyocera Mita Australia Pty., Ltd. 

6-10 Talavera Road, North Ryde, NSW, 2113, Australia 
Phone: -h61 2-9888-9999 
Fax: -1-61 2-9888-9588 



FS-1900 

1-12 



1-4 Environmental requirements 



1-4-1 Environmental conditions 

The Environmental requirements section on page 1-5 should be observed to ensure the optimum 
operation of the printer. The use of the printer in a location which does not satisfy the requirements 
may result in troubles and risk shortening its service life. 

The printer will work best if it is installed in a location that is: 

• Level and well supported (Place the printer on a table or desk.) 

• Not exposed to sunlight or other bright light (not next to an uncurtained window). Do not place 
the printer on an unstable cart, stand or table. 

• Near an AC wall outlet, preferably one that can be used for the printer alone. The outlet should 
have a ground slot, or an adapter should be used. If you use an extension cord, the total length of 
the power cord plus extension cord should be 17 feet or 5 meters or less. 

• Well ventilated, not too hot or cold, and not too damp or dry (See section Environmental 
requirements on page 1-5). If you install the printer where the temperature or humidity is outside 
the requirements in section Environmental requirements in chapter 1, the best print quality may 
not be expected and there will be an increased chance of paper jams. 

• Provide a sufficient clearances around the printer to ensure ventilation and ease of access. (See 
section Clearance on next page). 



FS-1900 
1-13 



(1) Clearance 

Allow the necessary minimum clearance on all sides of the printer as below. 




Figure 1-4-1 Clearances 



Ref. 


Clearance 


Dimensions [IVIinimum] 


d) 


Left 


30 cm (11-13/16 inches) 


(2) 


Front 


60 cm (23-5/8 inches) 


(3) 


Right 


25 cm (9-7/8 inches) 


(4) 


Back 


20 cm (7-7/8 inches) 


© 


Head room 


30 cm (11-13/16 inches) 



FS-1900 



1-14 



(2) Places to avoid 

Avoid installing the printer in locations exposed to: 

• Direct drafts of hot or cold air. 

• Direct drafts of outside air. (Avoid locations next to outside doors.) 

• Sudden temperature or humidity changes. 

• Any source of high heat, such as a radiator or stove. 

• Excessive dust. Dust and smoke may cause contamination on the laser scanner window, causing 
print quality problem. 

• Vibration. 

• Ammonia fumes or other harmful fumes. (In case of fumigating the room or saturate it with 
insecticide, remove the printer first.) 

• Avoid greenhouse-like rooms. (Because of sunlight and humidity.) 

• Avoid enclosed spaces that block ventilation. 

• Avoid sites more than 6,500 feet or 2,000 meters above sea level. 

(3) Note on power 

Use only the power source voltage conforming to the printer's rated power voltage. Do not use 
other power sources. 

• Disconnect the printer from the power source before attempting removal or replacement of an 
electrical component or a printed-circuit board. 

• The printer should not be connected to a power source until the instruction is given to do so 
when performing tests described in this manual. 

• In connecting the printer power, exercise an extreme care in handling the power supply or any 
other electric parts which may give an electric shock. 

• Before performing maintenance or repair, power from both the power source and the associated 
peripheral devices (computer, sorter, etc.) should be disconnected, unless otherwise specified. 

• To avoid possible electrical shock, extreme caution must be exercised in handling the power 
cord and any other electrical part. 

• An easily accessible socket outlet must be provided near the equipment. 

WARNING As the disconnect device is not incorporated in the printer's AC primary 



FS-1900 
1-15 



(4) Removing the printer 

Observe the following precautions in removal and transportation of the printer. 

• Be sure to repack the printer in its original carton. 

• Do not leave the printer, toner container, process unit and other printer modules inside a vehicle 
if the outdoor temperature is more than 25 °C. As unexpectedly high temperature may develop 
inside when a vehicle is parked for a long period of time, the drum, toner container, process unit 
and the supplies should be removed from the vehicle. The vehicle during transportation should 
be parked in the shade or with the window open to allow minimum air circulation or the adequate 
air conditioning should be made. 

• Should the printer be left in a vehicle, it may not be exposed to the temperature change of more 
than 7 °C within 30 minutes. 

• Before removing the printer to a warm place, wrap it in a blanket, etc., before crating it. Allow 
approximately two to three hours after having moved after uncrated. Failure to observe the 
above may result in moisture condensation which will affect the performance of the printer. 



FS-1900 

1-16 



1-5 About the toner container 

1-5-1 Toner container 

The printer should use a Kyocera TK-50 toner kit. To ensure the high print quality and long service 
life, the following handling precautions should apply: 



CAUTION 



A 



As the Ecosys printers are designed to ensure the optimum print quality when 
used with Kyocera's proprietary toner, Kyocera do not recommend to use any 
refilled toner containers that may be available commercially. This is because 
Kyocera have no means of control over how such refilled toner could affect the 
print quality and the reliability of the printer. 



(1) Toner container liandling 

To loosen and mix the toner inside before use, with the label side down, thoroughly shake the toner 
container (T) (in the direction of the arrows) ten times or more. 




Figure 1-5-1 Toner container handling 



CAUTION 



A 



The toner container is not designed for disassembly or refilling. Do not attempt 
to disassemble or refill the toner container. 



FS-1900 



1-17 



(2) Toner container storage 

The toner contained in the container is susceptible to temperature and humidity. To ensure the high 
print quality, store the toner container in a place that satisfies the following environmental conditions: 

Temperature: -20 to 40 °C (-4 to 104 °F) 
Humidity: 15to90%RH 

NOTE If the toner container is removed from the printer's developer, put it in a 

protective bag and keep it in a dark place. 

CAUTION If the printer is shipped for return, etc., do not ship it with the toner container 

A installed. Remove the toner container from the developer and put in a plastic 

bag and seal the plastic bag. Otherwise, toner may leak and contamination may 
result in the printer. 



FS-1900 

1-18 



Chapter 2 Installation/Operation 



Chapter 2 Contents 



2-1 Unpacking 2-3 

2-1-1 Unpacking and inspection 2-3 

2-2 Installing the printer 2-5 

2-2-1 Installing the toner container 2-5 

Removing the toner container 2-7 

2-2-2 Installing the waste toner box 2-8 

Removing the waste toner box 2-9 

2-2-3 Expanding the memory (DIMM) 2-10 

(1) Minimum memory requirements 2-10 

(2) DIMM specifications 2-10 

(3) Notes on handling DIMM 2-11 

(4) Installing the DIMM 2-12 

(5) Testing the expansion memory 2-13 

(6) Installing the option hard disk (Microdrive) 2-14 

(7) Installing the option memory card (CompactFlash) 2-15 

(8) Installing the option network interface card 2-16 

(9) Installing the option serial interface board 2-17 

2-3 Using the operator panel 2-18 

2-3-1 Operator panel 2-18 

(1) Indicators and keys 2-18 

(2) Interface indicator 2-20 

(3) Paper size indicator 2-20 

(4) Paper type Indicator 2-21 

(5) Message display 2-22 

2-3-2 Menu selection system 2-23 

(1) Menu selection and sequence 2-23 



2-1 Unpacking 



2-1-1 Unpacking and inspection 

The printer package should contain the items as shown in the figure below. After unpacking, remove 
the printer and all the accessories from the package. 

For unpacking, place the box containing the printer on a flat, stable surface. Remove the manuals, 
toner kit, and other items located on top of the spacer. Then remove the spacer. Carefully remove 
the printer. Obtain help from other persons if necessary. 





Figure 2-1-1 Unpacking 



(T) Printer 
(2) Toner container 
(D Waste toner bottle 
Power cord 



(D Installation manual 

® Kyocera digital library CD-ROM 

(7) Plastic bag 



FS-1900 



2-3 




® 




® 





® 





(T) Printer 

(2) Toner container 

(3) Waste toner box 

(4) Power cord 



(5) Installation manual 

(§) Kyocera digital library CD-ROM 

(7) Plastic bag 



Figure 2-1-2 List of shipped components 



FS-1900 



2-4 



2-2 Installing the printer 

Installing the printer requires several steps. Proceed as follows in sequence. 

2-2-1 Installing the toner container 

1 . Open the top cover all the way. 

2. Take toner container (T) from the bag. With the label side down and pivoting on the middle of 
the container, thoroughly shake the toner container (in the direction of the arrows) ten times or 
more to loosen and mix the toner inside. 




Figure 2-2-1 Shake the toner container 



FS-1900 



2-5 



3. Carefully remove the protective seal (2). 




Figure 2-2-2 Removing the protective seal 



4. Install the toner container (3) into the printer. 




Figure 2-2-3 Installing the toner container 



FS-1900 



2-6 



Removing the toner container 

To remove the toner container, pull the lock lever (green colored) (T) and gently lift the toner 
container. 



NOTE 



Do not remove the toner container unless you need to do so for servicing, etc. 




Figure- 2-2-4 Removing the toner container 



FS-1900 



2-7 



2-2-2 Installing the waste toner box 

The waste toner bottle must be installed in the printer. It must be properly fitted inside the left cover 
as explained below. 

1 . Open the cap (l) of the waste toner box (2). 

2. Open the left cover (3) and install the waste toner box (2) so that it is properly seated in the area 
under the drum unit. 

3. Close the left cover (3). 




Figure 2-2-5 Installing the waste toner box 



FS-1900 



2-8 



Removing the waste toner box 

To remove the waste toner box (l), while holding the waste toner box (T), press the lock lever (2) 
aside, then gently remove the waste toner box (T) sideways. 



NOTE 



Do not remove the waste toner box unless you need to do so for service, etc. 




Figure 2-2-6 Removing the waste toner box 



2-9 



FS-1900 



2-2-3 Expanding the memory (DIMM) 

The FS-1900 comes standard-equipped with 16 MB of main memory. The FS-1900 can be expanded 
up to the maximum of 144 MB (16 MB + 128 MB). Expansion should be done using optional 
DIMMs (Dual In-line Memory Module). 

(1) Minimum memory requirements 





Resolution 


Printing environment 
(Emulation) 


300 dpi 


600 dpi 


1200 dpi 
(Fast mode) 


PCL6, duplex mode = None 


8MB 


8MB 


8MB 


PCL6, duplex mode = On 


8MB 


8MB 


8MB 


KPDL, duplex mode = None 


8MB 


8MB 


8MB 


KPDL, duplex mode = On 


8MB 


8MB 


12 MB 


PCL6/KPDL resource protection, 
duplex mode = None 


- 


10 MB 


10 MB 


PCL6/KPDL resource protection, 
duplex mode = ON 


- 


14 MB 


14 MB 



(2) DIMM specifications 



Item 


Specification 


Memory size in MB 


16, 32, 64, 128 MB 


Number of pins 


100 pins 


Access speed 


66 MHz 


Parity 


None 


Bus width 


32 bits 



FS-1900 



2-10 



(3) Notes on handling DIMM 

Before proceeding to install DIMM, to protect the main board and DIMMs, read the following 
notes: 

NOTE • Before touching a DIMM, touch a water pipe or other large metal object to 

discharge yourself of static electricity. 

• While doing the work, it is recommended that you wear an antistatic wrist 
strap. 

• Touch the main board and DIMM only by the edges, not in the middle. 





Figure 2-2-7 Handling DIMM 



FS-1900 



2-11 



(4) Installing the DIMM 

The main board of the printer is equipped with one socket for installing extra DIMM. 



CAUTION 



A 



WARNING 



A 



Be sure that no foreign objects such as metal chips or liquid get inside the 
printer during installing DIMM. Operation of the printer during the presence of 
a foreign substance may lead to fire or electric shock. 

Before proceeding installation, turn the printer's power switch off. Unplug the 
printer's power cable and disconnect the printer from the computer or the 
network. 



1. Turn the power switch off. 

2. Remove the memory card (CompactFlash) that may be inserted in the memory card slot (?) at 
the left side of the printer. 

3. Remove the main board (g) by removing the two (plated) screws (s). 

4. Pull the main board (g) all the way out of the printer. 




Figure 2-2-8 Removing the main board 



FS-1900 



2-12 



5. Open the clips @ on both ends of the DIMM socket (s). 

6. Insert the DIMM (§) into the DIMM socket (5) so that the notches on the DIMM align with the 
corresponding protrusions in the slot. 



jruj.^^^LjrUxL^£2, 



1 i 








Figure 2-2-9 Inserting the DIMM (1) 



7. Close the clips @ on the DIMM socket (§) to secure the DIMM (§). 



® 




\\\\\\\\\\\[\\\\\\[\\\ W W \\M \\U U\\\^ V 





Figure 2-2-10 Inserting the DIMM (2) 

(5) Testing the expansion memory 

To test the expansion memory, turn printer power on and print a status page. If the installation has 
been successful, the Available Memory item of the status page will show the expanded memory 
size corresponding to the amount of memory added. 



FS-1900 



2-13 



(6) Installing the option hard disk (Microdrive) 

The main board of the printer is equipped with a socket for the hard disk (Microdrive). If the hard 
disk is installed in the printer, received data can be rasterized and stored on this hard disk. This 
enables high-speed printing of multiple copies using an electronic sort function. Also, by using the 
quick copy job function or private/stored job function, desired documents can be printed at any 
later time. For details of these functions, refer to the printer's Users Manual. 



CAUTION 

A 

WARNING 

A 



Take precautions that no foreign objects such as metal chips or liquid get inside 
the printer during the installation process. Operation of the printer during the 
presence of a foreign objects may lead to fire or electric shock. 

Turn the printer's power switch off. Unplug the printer's power cable and 
disconnect the printer from the computer or the network. 



1. Turn the power switch off. 

2. Remove the main board (?) from the printer. (See step 2 to 4, on page 2-12.) 

3. Install the hard disk (g) to the hard disk slot (s). 




Figure 2-2-11 Installing the option hard disk 



FS-1900 



2-14 



(7) Installing the option memory card (CompactFlash) 

CAUTION Do not insert or remove a memory card (CompactFlash) while power is on. If 

A the memory card is removed while the printer is on, damage could result in the 

printer's electronics or the memory card. 

1 . Turn the power switch off. 

2. Insert the memory card (T) in the memory card slot (g) at the right bottom of the printer. Insert it 
face up, connector end first. Push it in all the way. 




Figure 2-2-12 Installing the option memory card 



FS-1900 



2-15 



(8) Installing the option network interface card 

The main board of the printer is equipped with a network interface card slot (KUIO-LV type, 3.3 
V). 



CAUTION 

A 

WARNING 

A 



Be sure that no foreign object such as metal chips or liquid get inside the 
printer during the installation process. Operation of the printer during the 
presence of a foreign object may lead to fire or electric shock. 

Turn the printer's power switch off. Unplug the printer's power cable and 
disconnect the printer from the computer. 



1. Turn the power switch off. 

2. Remove the two screws (T) then remove the option interface card slot cover (g). 

3. Insert the network interface card (s) to the option interface card slot (4). 

4. Fix the network interface card (s) by two screws (T). 

5. Connect the network cable (s) to the network interface card (5). 

6. Set the network address from the printer operator panel. (Refer to the printer's User's Manual) 




FS-1900 



Figure 2-2-13 Installing the option network interface card 



2-16 



(9) Installing the option serial interface board 

The main board of the printer is equipped with a serial interface connector (YC05) for serial interface 
board IB- lOE. 



CAUTION 

A 



WARNING 



A 



Be sure that no foreign object such as metal chips or liquid get inside the 
printer during the installation process. Operation of the printer during the 
presence of a foreign object may lead to fire or electric shock. 

Turn the printer's power switch off. Unplug the printer's power cable and 
disconnect the printer from the computer. 



1. Turn the power switch off. 

2. Remove the two screws (T) then remove the main board (g). 

3. Remove the two screws (§) then remove the option interface card slot cover (4). 

4. Insert the serial interface board (s) to the option interface card slot (§). 

5. Fix the serial interface board (s) by two screws (s). 

6. Connect the connectors of cable (7) between serial interface board connector (s) and main board 
connector (YC05 (9)). 

7. Make sure that the serial interface board has been properly installed by printing out the printer's 

status page. 




CD ®r 

Figure 2-2-14 Installing the option serial interface board IB-10E 

2-17 



FS-1900 



2-3 Using the operator panel 

This section provides explanation on how to use the printer's operator panel. 
For details on operating the printer, refer to the printer's User's Manual. 

2-3-1 Operator panel 

The printer's operator panel has the following indicators, keys and message display. Note that 
adjustments made using these keys may be overridden by those made from within the application 
software. 

Message display (D (g) (s) © ® ® 



U 



■=>cili" 



ATTENTION 



INTERFACE 



SIZE TYPE 



m 



/ .-^-^z .-^^z 



CANCEL I MENU ] V ] ENTER 



(14) (13) (12 



(6) (8) (g 



Figure 2-3-1 Operator panel 



(1) Indicators and keys 



Indicator 


Condition 


Description 


© READY indicator 


Flashing 


An error has occurred that the user can clear. 




Lit 


The printer is on-line and ready to print. 




Off 


The printer is off-line. The printers stores but does not 
print received data. This is also indicates when printing 
is automatically stopped due to the occurrence of an error. 


@ DATA indicator 


Flashing 


Data transfer between the printer and the computer is 
taking place. 




Lit 


Either data is being processed, or data is being written 
onto the option CompactFlash or Microdrive. 


(D ATTENTION indicator 


Flashing 


The printer needs maintenance attention or the printer is 
warming up {Please wait). 




Lit 


A problem or an error has occurred that the user can 
clear, for example, paper jam. 




Off 


Operations are normal. 



FS-1900 



2-18 



Key 


Function 


® GO key 


• Switches the printer on-line and off-line. 

• Prints and feed out one page. 


(5) CANCEL key 


• Cancels a printing job. 

To cancel a print job, proceed as follows: 

1 . Check the message Processing is displayed in the message 
display. 

2. Press the CANCEL key. 

3. The message Print Cancel ? will appear in the message display 
and the interface to be canceled will be displayed. 
Parallel 

USB 

Serial (appears only when an [option] serial interface board is installed) 

Option (appears only when an [option] network interface card is installed) 

Press the CANCEL key again if you wish to stop the cancellation of 

printing. 

4. Selecting the interface to cancel using the a or v key. Then press 
the ENTER key. Printing from the interface selected will be stopped. 
The Cancelling data message appears in the message display 
and printing stops after the printer finishes printing the current page. 

• Resets numeric values, or cancels a setting procedure. 

• Stops the sound alaiin that indicates the occurrence of an error. 


(6) MENU key 


• Enter menu mode 

• When pressed during menu selection, teiminates the setting and returns 
to the Ready condition. 


@Akey 


Lets you access the desired item or enter numeric values. In some of the 
control procedures, the < and > keys are used to enter or exit the sub items. 


(Dvkey 


Enables access to the desired item or entering of numeric values. In some 
of the control procedures, the < and > keys are used to enter or exit the sub 
items. 


(9) < key 


Used as the < key in the menu selection. 


@ > key ( Q key) 


• Used as the > key in the menu selection. 

• Displays on-line help messages on the message display when paper jam 
occur. When pressed in the Ready condition, displays on-line help 
messages. 


©ENTER key 


Finalizes numeric values and other selections in menu selection. 



FS-1900 



2-19 



(2) Interface indicator 

The INTERFACE indicator @ shows which of the printer's interfaces is currently active. It uses 
the following abbreviations: 



Message 


Meaning 





No interface is currently used. 


PAR 


Standard bidirectional parallel interface 


USB 


Standard USB interface 


SER 


[Option] serial interface board (RS-232C) 


OPT 


[Option] network interface card 



The PAR , USB, SER , or OPT indicator flashes when the printer is receiving data and remains 
indicated for the duration of the interface time-out time. 

(3) Paper size indicator 

The SIZE indicator @ indicates the size of the current paper cassette. Default is Letter size for the 
U.S.A. and A4 for European countries. While the printer is Processing data to print, the SIZE 
indicator switches to indicate the paper size selected by the application software. 

The following abbreviations are used to indicate paper sizes. 



Message 


Paper size 


Message 


Paper size 


A4 


ISO A4 (21x29.7 cm) 


EX 


Executive (7-1/4 x 10-1/2 inches) * 


A5 


ISO A5 (14.8x21 cm) 


B6 


JISB6 (12.8x18.2 cm)* 


DL 


ISO DL (11x22 cm)* 


#6 


Commercial 6-3/4 (3-5/8 x 6-1/2 inches) * 


A6 


ISO A6 (10.5x14.8 cm)* 


#5 


Commercial 9 (3-7/8 x 8-7/8 inches) * 


B5 


JISB5 (18.2x25.6 cm) 


02 


Oficio II (8-1/2x13 inches)* 


LT 


Letter (8-1/2 X 11 inches) 


ST 


Statement (5-1/2 x 8-1/2 inches) * 


LG 


Legal (8-1/2 X 14 inches) 


FO 


Folio (210x330 cm)* 


MO 


Monarch (3-7/8 x 7-1/2 inches) * 


HA 


Japanese postcard (10 x 14.8 cm) * 


BU 


Business (4-1/8 inches) * 


OH 


Return postcard (20 x 14.8 cm) * 


DL 


ISO DL (11x22 cm)* 


Y2 


Envelope [Youkei 2] (114 x 162 cm) * 


C5 


ISO C5 (16.2x22.9 cm)* 


Y4 


Envelope [Youkei 4] (105 x 235 cm) * 


b5 


ISO B5 (17.6x25 cm)* 


CU 


Custom size (14.8 x 21 cm to 21.6 x 35.6 cm) 



with only the MP tray feeding 



FS-1900 



2-20 



(4) Paper type Indicator 

The TYPE indicator @ indicates paper types. The following abbreviations are used to indicate 
paper types. 



Message 


Paper type 


(none) 


Auto 


ROUGH 


Rough 


PLAIN 


Plain 


LETTERHEA 


Letterhead 


TRNSPRNCY 


Transparency* 


COLOR 


Color 


PREPRINTE 


Preprinted 


PREPUNCH 


Prepunched 


LABELS 


Labels* 


ENVELOPE 


Envelope* 


BOND 


Bond 


CARDSTOCK 


Cardstock* 


RECYCLED 


Recycled 


CUSTOMl (to 8) 


Custom 1 (to 8) 


VELLUM 


Vellum* 



with only the MP tray feeding 



FS-1900 



2-21 



(5) Message display 

The message display gives information in the form of short messages. The six messages listed 
below are displayed during normal warm-up and printing. Other messages appear when the printer 
needs the operator's attention as explained in Chapter 6 Troubleshooting. 



Message 


Meaning 


Self test 


The printer is self- testing after power-up. 


Please wait 


The printer is warming up and is not ready. When the printer is 
switched on the first time after the toner container is installed, 
(Adding toner) also appears. 


Ready 


The printer is ready to print. 


Processing 


The printer is receiving data, generating graphics, reading an memory 
card (CompactFlash)/hard disk (Microdrive), or printing. 


Waiting 


The printer is waiting for a command that says the job is over before 
printing the last page. Pressing the GO key allows you to obtain the 
last page immediately. 


Sleeping 


The printer is in Sleep mode. The printer wakes from Sleep mode 
whenever a key on the operator panel is pressed, the cover is opened 
or closed, or data is received. The printer then wainis up and goes 
on-line. (The time that it takes the printer to enter Sleep mode depends 
on the Sleep Timer setting.) 


Cancelling data 


Data inside the printer is being canceled. 


FormFeed Time Out 


The printer prints the last page after a waiting period. 



FS-1900 



2-22 



2-3-2 Menu selection system 

The MENU key on the operator panel allows you to use the menu selection system to set or change 
the printer environment such as the paper source, emulation, etc. Settings can be made when Ready 
is indicated on the printer message display. The printer obeys the most recently received printer 
settings sent from the application software, or from the printer driver, which take priority over 
operator panel settings. 



(1) Menu selection and sequence 

The following is the hierarchy diagram of the menu selection system of the printer. 



Ready 

PAR A4 PLAIN 



Print 
Menu Map 



Print 
Status Page 



e-MPS 



Inter face 
Parallel 



Interface 
USB 



I I These items will not 
show unless the printer 
is installed with the 
applicable option unit. 



>Quick Copy 



>Private/ Stored 



>Print VMB Data 



>List of VMB 



>List of 
Code JOB 



>e-MPS 
Con fi gurati on 



»Quick Copy 



»Temp.Code JOB 
Size 



»Perm . Code JOB 
Size 



»VMB Size 



>Parallel I/F 
Nibble (high) 



>Parallel I/F 
Auto 



>Parallel I/F 
Normal 



>Parallel I/F 
High Speed 



Inter face 
Serial 



Interface 
Option 



>Bau rate 
9600 



>Data Bits 
8 



>Stop Bits 

1 



>Parity 
None 



>Protocol 

DTR (pos . ) &XON 



>Barcode Mode 
Off 



>NetWare 
Off 



>Net Ware 
On 



>>NetWare Frame 
Auto 



>TCP/IP 
Off 



> TCP /IP > 
On 


1 














»DHCP 
Off 












»IP Address 








»Subnet Mask 








»Gateway 










>Ether Talk 
Off 





>OPT. StatusPage 
Off 



Continued on next page. 



FS-1900 



2-23 



^ 



Emulation 
PCL 6 



Emulation 
KPDL 



>Prlnt KPDL errs 
Off 



>Prlnt KPDL errs 
On 



Emulation 
KPDL (AUTO) 



>Alt . Emulation 
PCL 6 



>Prlnt KPDL errs 
Off 



>Prlnt KPDL errs 
On 



Emulation 
Line printer 



Emulation : 

IBM Proprlnter 



Emulation 
DIABLO 630 



Emulation 
EPSON LQ-850 



Font Select 
Internal 



Font Select 
Option 



q 



» 1000 



>>Courler 
Dark 



>>Courler 
Regular 



»Letter Gothic 
Regular 



»Letter Gothic 
Dark 



»Slze 
012. 00 point (s) 



»Pltch 



10.00 cpl 



>Alt . Emulation 
PCL 6 



>Llst of 
Internal Fonts 



>Llst of 
Option Fonts 



Page set 



>Coples 



001 



>Orlentatlon 
Portrait 



>Orlentatlon 
Landscape 



>Page Protect 
Auto 



>Page Protect 
On 



>LF Action 
LF only 



>LF Action 
CR and LF 



>LF Action 
Ignore LF 



>CR Action 
LF only 



>CR Action 
CR and LF 



>CR Action 
Ignore CR 



>Wlde A4 
Off 



>Wlde A4 
On 



Continued on next page. 



FS-1900 



2-24 



Print Quality > 



>KIR Mode 
On 



>KIR Mode 
Off 



>Ecoprint Mode 
Off 



>Ecoprint Mode 
On 



>Resolution 
Fast 1200 mode 



>Resolution 
300 dpi 



>Resolution 
600 dpi 



>Print Density 
03 



Hard Disk 



>Read Data 



>Write Data 



>Delete Data 



>List of 
Partitions 



RAM Disk Mode 
Off 



RAM Disk Mode 
On 



>RAM Disk Size 



>Read Data 



>Write Data 



>Delete Data 



>List of 
Partitions 



1 



Memory Card > 



>Read Fonts 



>Read Data 



>Write Data 



>Delete Data 



>List of 
Partitions 



Continued on next page. 



FS-1900 



2-25 



Paper Handling > 



>MP Tray Mode 
First 



>MP Tray Size 
A4 or Letter 



>MP Tray Type 
Plain 



>EF Size 
DL or Business 



>EF Type 
Plain 



>BulkFeeder Size 



>BulkFeeder Type 
Plain 



>Cassette Size > 


1 








1 






»Unit 
nun 






■ 






»Unit 
inch 








»X Dimension 








»Y Dimension 










>Cassette Type 
Plain 





>Feed Select 
Cassette 



>Duplex Mode 
None 



>Stack Select 
Face-down tray 



>Opt . StackerMode 
Sorter 



>Override A4/LT 
Off 








>Override A4/LT 
On 








>Type Adjust > 
Custom 1 


— 1 






»Paper weight 
Normal 






■ 






»Paper weight 
Heavy (Thick) 












»Paper weight 
Light (Thin) 






■ 






»Duplex Path 
Disable 






■ 






»Duplex Path 
Enable 










>Reset Type 
Adjust 





■% 



LIFE Counters 



Others 



FS-1900 



2-26 



>Total Print 
0123456 



>New Toner 
Installed 



>MSG Language 
English 



>Form Feed 

Time Out 030 sec. 



>Sleep Timer : 
005 min. 



»Sleep Mode 
On 



>>Sleep Mode 
Off 



>Print HEX-DUMP 



>Printer Reset 



>Resource prot . 
Off 



>Resource prot . 
Permanent 



>Resource prot . 
Perm / Temp 



>Buzzer 
On 



>Buzzer 
Off 



>Auto Continue 
Mode On 



>>Auto Continue 
Timer OOOsec. 



>Auto Continue 
Mode Off 



>Service 



»Print 

Status Page 
■ 
»Devel oper 



»Drum 



Chapters Maintenance/Adjustments 



Chapter 3 Contents 



3-1 Maintenance/Adjustments 3-3 

3-1-1 Life expectancy of modules 3-3 

3-1 -2 Toner container 3-4 

(1) When to replace the toner container 3-4 

(2) Notes on changing the toner container 3-4 

(3) Toner container replacement 3-5 

(4) Toner saver mode (EcoPrint) 3-6 

(5) Replacing the waste toner box 3-7 

3-1-3 Cleaning the printer 3-8 

(1) Main charger unit 3-8 

(2) Cleaning the main charger wire and grid 3-9 

Main charger wire 3-9 

Grid 3-10 

(3) Paper transfer unit 3-12 

(4) Replacing the developer 3-13 

Shipping the developer 3-13 

(5) Developer initialization (Toner install mode) 3-14 

(6) Developer refreshing mode 3-15 

(7) Drum cleaning mode 3-16 

3-1-4 Updating the firmware 3-17 

(1) Firmware program data format 3-18 

(2) Downloading the firmware from the parallel interface 3-19 

(3) Downloading the firmware from the memory card 3-21 

(4) Downloading errors 3-23 



3-1 Maintenance/Adjustments 

3-1-1 Life expectancy of modules 

The table below shows the nominal life expectancy for modules. Detailed part information for each 
module (except toner containers) can be found in the separate Parts Catalog. 

Table 3-1-1 Life expectancy of modules 



Module 


Model 


Nominal life (pages) 


Toner container*' 


TK-50 


10,000 


Drum unit 


DK-63 


300,000 


Developer 


DV-62 


300,000 


Fuser unit 


FK-60 


300,000 


Main charger unit 


MC-60 


300,000 


Refurbishment kit*^ 


MK-63 


300,000 



*': User-replaceable 

*^: Includes DK, DV, and FK kits and a feed unit. 



FS-1900 



3-3 



3-1 -2 Toner container 

Assuming an average toner coverage of 5 % with EcoPrint mode turned off, the toner container 
TK-50 will need replacing approximately once every 10,000 pages. 

Table 3-1 -2 Toner container 



Kit 


Life in pages 


TK-50 


10,000 



Based on letter or A4 size paper; average print coverage of 5 % 



NOTE A new printer in which a toner kit TK-50 is installed for the first time, the 

number of copies that can be printed will be limited to approximately 5,000 
pages. 



(1) When to replace the toner container 

When the printer runs low on toner. Toner low TK-50 display and ATTENTION indicator lit 
on the operation panel. Be sure to promptly replace the toner container and clean the inside of the 
printer when this message appears. 

If the printer stops printing while Replace toner TK-50 is display, replace the toner container 
to continue printing. 



(2) Notes on changing the toner container 

Observe the following cautions when replacing the toner container: 

• Do not attempt to disassemble the old toner. 

• Do not attempt to reuse the waste toner inside. 

• Keep magnetic media such as floppy disks away from the toner container. 

• Be sure to clean the parts as instructed in section 3-1-1 Cleaning the printer on page 3-8 at the 
same timing of replacing toner container. 

• Use of the Kyocera toner kit TK-50 is highly recommended for the optimum operation of the 
printer. 



FS-1900 

3-4 



(3) Toner container replacement 

To replace the toner container, open the top cover. Pull the lock lever (?) to the right and gently lift 
the old container (g). 




Figure 3-1-1 Removing the old toner container 



FS-1900 



3-5 



Put the old toner container in the supplied plastic bag (s) and dispose of it. 




Figure 3-1-2 Disposal of the old toner container 



NOTE 



Although the toner container is made from non-harmful, flammable material, 
be sure to dispose of it according to laws and regulations. 



See also the instructions provided in chapter 2, Installing the toner container on page 2-5 to complete 
installation of the new toner container. 

(4) Toner saver mode (EcoPrint) 

The EcoPrint enables to reduce the amount of toner consumed on the page so as to save printing 
costs by drastically extending the toner container life. EcoPrint mode is factory- set to off and 
turned on by using the menu system of the printer operator panel. For details, see the printer's 
User 's Manual. 



FS-1900 



3-6 



(5) Replacing the waste toner box 

Note that the printer has a sensor to monitor the presence of the waste toner box. The printer does 
not operate without a waste toner box installed. 

For the reference, the waste toner box can hold up to 100 g of waste toner. The nominal amount of 
waste toner derived after 10,000 pages of printing is 20 to 30 g (Letter or A4 size paper; average 
print coverage of 5 %). After a prolonged amount of printing low density (coverage) data, the 
"check waste toner bottle" message may be displayed earlier than the "replace toner clean printer" 
message. 

Open the side cover. While holding old the waste toner box (T), press the lock lever (g) in the right 
ward direction. Then gently pull out the waste toner box 0. Close the cap (s) of waste toner box (T) 
after removing from the printer. To avoid toner spilling, place the capped waste toner box (?) in the 
plastic bag (?) supplied before forwarding to proper disposal. 

Locate the new waste toner box in the toner kit, and install it in the printer according to section 2- 
2-2 Installing the waste toner box on page 2-8. 




Figure 3-1-3 Removing the old waste toner box 



FS-1900 



3-7 



3-1-3 Cleaning the printer 

To avoid print quality problems, the following printer parts must be cleaned with every toner container 
replacement. 

(1) Main charger unit 

The main charger unit should be cleaned in its two parts, the main charger wire and grid (See figure 
below.) whenever the toner container is changed. Cleaning of the main charger can be done without 
needing any tools thanks to its self-cleaning system. 



Cleaning pad 
Main charger wire 




Cleanig knob 



Figure 3-1-4 Main charger unit 



FS-1900 



3-8 



(2) Cleaning the main charger wire and grid 
Main charger wire 

1 . Open the left cover (l). 

2. Pull the cleaning knob (green colored) (2) slowly in and out a few times. 

NOTE Cleaning knob pulls a cleaning pad inside the drum unit along the main charger wire. 




Figure 3-1-5 Cleaning the main charger wire 



FS-1900 



3-9 



Grid 

1. Take the grid cleaner (J) from protective bag (g) in the new toner kit and remove the cap (§). 



NOTE 



The grid cleaner pad is impregnated with water. Perform the following cleaning 
procedure before the pad dries. 




Figure 3-1-6 Grid cleaner 



2. Attach the grid cleaner (?) to the drum unit (s) with the pad uppermost as shown in the diagram. 




Figure 3-1-7 Attaching the grid cleaner 



FS-1900 



3-10 



3. After attaching the grid cleaner, repeat the action of slowly pulling out and then pushing back in 
the main charger unit at least 5 times. It is easier to pull out the main charger with its front end 
raised slightly as shown in the figure. The grid part underneath the main charger is cleaned by 
the wet pad of the grid cleaner. 




Figure 3-1-8 Cleaning the grid 



4. Remove the grid cleaner from the printer and dispose of it. The grid cleaner is not reusable. 



FS-1900 



3-11 



(3) Paper transfer unit 

To avoid print quality problems due to paper dust and debris, clean the paper transfer unit in the 
following manner: 

Pull the paper transfer unit release lever (T) up and draw the paper transfer unit all the way out until 
it stops. Wipe the paper dust on the upper registration roller (g) and the paper ramp (s) using the 
wiper cloth (?) included in the toner kit. 



CAUTION 



A 



Do not touch the transfer roller (5) (black sponge roller) when wiping the paper 
ramp (3). 

Area (§) below is factory-applied with lubricating oil. When cleaning the paper 
transfer unit (t), do not use alcohol to clean this area. If the oil is completely 
removed, an incorrect action of the MP tray paper sensor ((s), actuator) will result. 




Figure 3-1-9 Cleaning the upper registration roller and the paper ramp 



FS-1900 



3-12 



(4) Replacing the developer 

To remove the developer unit from the printer for shipment or replacing to a new one, it should be 
handled following the instructions below. 

After the replacement, new developer needs to be initialized in manner explained in the section 
Developer initialization (Feeding toner into the new developer) on next page. 

Shipping the developer 

The printer is supplied with a plastic bag that should be retained for future shipment of the developer. 

To pack the developer (T) in the packing carton, first flap down the magnet roller protective cover 
(2). Put the developer (l) into the supplied plastic bag (3). Put the developer (T) on the developer 
install position (4) of packing carton. 




Figure 3-1-10 Shipping the developer 



3-13 



FS-1900 



(5) Developer initialization (Toner install mode) 

The new developer unit is shipped from the factory with no toner contained. The developer can be 
automatically replete with toner when a toner container is installed onto it and the printer is turned 
on. However, because the toner reservoir in the developer has a large capacity, it requires a lengthy 
period of time until a substantial amount of toner has been fed to get the printer ready. (A new 
developer needs approximately 100 g for triggering the sensor inside.) 

A great many seconds of time for this is greatly deducted by using the service menu in the printer's 
mode select routine as accessed by its operation panel. Follow these steps to use this feature, top to 
bottom (For details, refer to section 2-3 Using the operator panel on page 2-18). 



Perform in sequence 



Display to show 



Remarl<s 



© Press the IVIENU key. 

(2) Press the a key (repeatedly). 



others 



(3) Press the > key. 

(4) Press the a key (repeatedly). 



>Serv±ce 



(5) Press the > key. 



>>Devel oper 



(6) Press the ENTER key. 



>>Devel oper ; 




(7) Press the ENTER key. 



The printer enters the service 
mode and the developer and toner 
motor are continually activated. 



(s) Turn printer power 
off then on. 



Self test 



Please wait 
(Adding toner) 



The printer continually engages in 
this mode for a period of 
approximately 8 minutes, after which 
the printer reverts to the Ready state. 



(9) Developer initialization is 
finished. 



Ready 



Note: If the printer is switched off in the middle of developer 
initialization, even after the printer is switch on again, the printer 
will automatically resumes developer initialization. To cancel the toner 
install mode in this case, first tum power off, press and hold all three 
paper size switches (See the figure above.), and turn power on. Let 
go off of the switches when the until message changes to Ready. 



Make a test print by printing a 
status page. If the status page is 
printed satisfactorily, setup is 
complete. If not, investigate 
whether all step procedures are 
properly followed. 



FS-1900 



3-14 



(6) Developer refreshing mode 

This mode is used to eliminate light printing problems. Once activated, the toner in the developer 
unit is enforced to be sent onto the drum unit, collected back in the waste toner bottles. At the same 
time the new toner is fed in the developer so that the developer unit is refilled with new toner. Once 
activated, the printer will keep engaged in this mode and be running for an average of 60 minutes. 



NOTE 

A 



The amount of the (old) toner replaced and collected in the waste toner bottle 
will be approximately 100 g. The waste toner bottle consequently become full 
and must be replaced with a new one. 



Perform in sequence: 



Display shows: 



(T) Turn printer power on. 



(2) Make sure the printer is Ready. 

(Connect the printer to the computer using the parallel interface. 



Ready 



(3) At the DOS prompt, send the following command to the printer: 
>ECHO !R!EXTP 7, 92; EXIT; >PRN 



(4) Turn printer power off, then on. The toner refreshing mode will 
begin. The old toner will be rejected in the first approximately 20 
minutes, followed by another 40 minutes interval in which the new 
toner is fed in the developer unit. 



Please Wait 
(Adding toner) 




Note: To cancel the toner install 
mode during in this mode first 
turn power off, press and hold 
all three paper size switches, and 
turn power on until message 
changes to Ready. 



(5) Check that the display reverts to Ready. 

(If the display shows "Call service 7350", refer to 
section 6-1-2 Diagnostic (Service error messages) on page 6-11. 



Ready 



(e) Print a page to check the print density. 

(If the print density is too dark (gray background), change the 
"Print Density" setting in the menu selection to 1 or 2 steps lighter. 
(Default is 3.) Refer to printer's User's Manual for details. 



Print density 
03 



3-15 



FS-1900 



(7) Drum cleaning mode 

This mode enforces the printer to rotate the drum against the cleaning roller inside the drum unit for 
a predetermined period of time. The cleaning roller then removes dust and debris that may have 
resulted from dew condensation on the drum. 

The printer automatically activates the drum cleaning mode based on the environmental conditions 
as the temperature/humidity sensor detects. The time required to complete the drum cleaning mode 
varies depending on the current setting for the sleep timer and will be deactivated during the developer 
initialization. 

The drum cleaning mode is also activated manually by following the steps below: 



Perform in sequence 


Display to show 


Remarl<s 


© Press the MENU key. 
















(2) Press the a key (repeatedly). 




others > 






(3) Press the > key. 






(4) Press the a key. (repeatedly). 




> Service > 






(5) Press the > key. 




»Drum 






(e) Press the a key. (repeatedly). 
















(7) Press the ENTER key. 




»Drum? 






(D Press the ENTER key. 




Drum is cleaned by the cleaning 
blade in the drum unit. If paper is 
present on the MP tray, the drum 
is also cleaned by that the paper 
which is fed automatically and 
stops at the transfer roller. 



FS-1900 



3-16 



3-1-4 Updating the firmware 

Updating the engine and system (controller) firmware is possible by downloading the firmware 
through the parallel interface or through the memory card (CompactFlash). These firmware programs 
are directly overwritten in the flash ROM on the printer's engine board or system DIMM [board 
KP-893] (Flash ROM type only) on the main board. The operator panel message in different 
languages can also be downloaded through the parallel interface or through the memory card 
(CompactFlash). 



NOTE 



System DIMM: Firmware update is possible only with a flash ROM type 
system DIMM [board]. Masked type system DIMM [board] can not be 
overwritten. Check the type of the system DIMM [board] currently used on the 
main board by service status page [see page B-5]). 



System DIMM [board] 




Main board 



Figure 3-1-11 System DIMM [board] 



FS-1900 



3-17 



(1) Firmware program data format 

Kyocera supplies the following types of data for updating firmware of the different purposes: 

• System firmware 

• Engine firmware 

• Operator panel message data 

The data to be downloaded are supplied in the following format: 



System firmware file name example 



SB02K8400.bcmp 



I compression 

— Boot program is included. 
Version code: Version 84.00 

ID code for Kyocera 

— Machine code: FS-1 900 (B02) 
ID code for system firmware 



Engine firmware file name example 

EB02KA002.X01 



I— —I I , I I— I L 



I Void 

Version code: Version A002 



— ID code for Kyocera 

' Machine code: FS-1 900(802) 

ID code for engine firmware 



Operator panel message data file name example 

dm0201 . spa 



—I I , 1 1_ 



L Language code — 
- Version code: Version 01 
— Machine code: FS-1900(B02) 
ID code for operator panel massage data 



jpn: Japanese 

dan: Dutch 

swe: Swedish 

ita: Italian 

spa: Spanish 

por: Portuguese 

rus: Russian 

pol: Polish 

I — cze: Czech 



FS-1 900 



3-18 



(2) Downloading the firmware from the parallel interface 

This section explains how to download firmware data from the parallel interface. The printer system 
can automatically recognize whether the data to be overwritten is for the engine firmware, the 
controller firmware or operator panel message data. 

CAUTION Downloading the controller firmware takes several minutes. Do not turn power 

NOTE MS-DOS is required for a downloading from the parallel interface. The 

computer must be connected to the printer with a parallel cable. 

(?) Turn power switch on. 

(2) At the DOS prompt, send the command to the printer that engages the printer in the supervisor 
mode. 

(3) Copy the firmware data to the printer. (See the flow chart below) 

[System firmware ex. SB02KA8400 . bcmp. Engine firmware ex. EB02KA002 . xOl, Operator 
panel message data ex. dm0201 . spa] 






® 


Power switch: On) 


je display 






Messac 




Self test 






i 






Ready 






® 




PC display 




>ECHO ! Ri UPGR 'SYS' ; EX I T; >PRN 


A 




1 








>Supervisor mode 
Parallel waiting 






® 








n 


>COPY/B SB02K820C 
>COPY/B EB02KA002 
>COPY/B dm0201.Sf 
















13 

m 






















0: System firmware 
0: Engine firmware 
EO: Operator panel message data 


W To the next page 1 



3-19 



FS-1900 



(4) Supervisor mode. The parallel interface is waiting for the firmware data. 

(5) Receiving the firmware data. 

(§) The system DIMM or flash ROM is overwritten with the new firmware data. 

(7) Firmware downloading is finished. (When more than one data are down loaded, the data display 

can be changed by pressing any key.) 
(s) Turn power switch off and on. 
(D Check the that printer gets Ready. 



From the previous page 



S : System firmware 
B : Engine firmware 
El : Operator panel message data 

[■_"_■; : Shows only included firmeware 

of boot program (".bcmp" extension file). 



Si 



(6)r 



BootROM 
eraseSwrite 



X 



DIMM erasing #?? 



T 



DIMM writing 



® 



84.00S 
01/10/18[1234] 2 



A: u= Extracting 

i?= Writing 

v= Verifiying 
B: Version 
C: Machine code 
D: Language 
E: Year/Month/Day 
F: [Checksum] 
G: Means more than one data 



® 



Message display 



Supervisor mode 
parallel waiting 



© 



data receiving 



® 



engine download 



® 



01 A002 

01/10/181123^ ? 



@ Power switcii: Off/On) 



Ready 



fSiEi 



El 



message download 



® 



Spanish 04 

01/10/18 [1234] a 

-^ M 



Confirm that the status page shows the new engine firmware, system firmware or operator panel 
message data version (See Appendix B on page B-4). If the message display indicates download 
error, refer to section Downloading errors on page 3-23. 



FS-1900 



3-20 



(3) Downloading the firmware from the memory card 

To download data written in a memory card (CompactFlash) to the printer, proceed as explained in 
this section. 



CAUTION 

A 



NOTE 



Downloading firmware takes several minutes. Do not turn power off during 
downloading. If downloading is interrupted by an accidental power failure, 
etc., the system DIMM may have to be replaced. 

The firmware program data must be stored to the root directory of the memory 
card (CompactFlash). 



(?) Turn power switch off. 

(2) Insert the memory card in the printer's memory card slot. 

(3) Turn power switch on. 

(4) The printer is automatically engaged in the supervisor mode. The parallel interface receives for 
the firmware data. 



feinti 



Power switch: Off) 




(3) Power switch: On 



Message display 



Self test 



To the next page 



3-21 



FS-1900 



(s) Data are transferred to the RAM on the main board. 

(e) The system DIMM or Flash ROM is overwritten with the new firmware data. 

(7) Firmware download is finished. (When more than one data are down loaded, the data display 

can be changed by pressing any key. 
(s) Turn power switch off. 
(9) Remove the memory card. 
@ Turn power switch on. 
@ Check the printer gets Ready. 






System firmware 
Engine firmware 
Operator panel message data 



;"_"_■; : Shows only included firmeware 

of boot program (".bcmp" extension file). 



Sj 



® 



BootROM 
eraseSwrite 



_L 



DIMM erasing #?? 



DIMM writing 



(z) 



84. 00s 
01/10/18[1234] 2 



A: u= Extracting 

71= Writing 

v= Verifiying 
B: Version 
C: Machine code 
D: Language 
E: Year/Month/Day 
F: [Checl^sum] 
G: Means more than one data 



From the orevious oaae 



® 



Message display 



Supervisor mode 



Supervisor mode 
CF-CARD Reading 



§) engine download 



® 



B 



01 A002 

01/10/18 [1234] 2 

\ ^ 



(D Power switch: Off ) 
1 



@ 
@ 



Power switch: On 



Ready 



ED 



message download 



® 



Spanish 04 

01/10/1811234] 2 




Confirm that the status page shows the new engine firmware, system firmware or operator panel 
message data version (See Appendix B on page B-4). If the message display indicates download 
error, refer to section Downloading errors on page 3-23. 



FS-1900 



3-22 



(4) Downloading errors 

The following messages are indicated on the message display when an error occurred during 
downloading the firmware data. 



Error message 


Description 


Corrective action 








Deficit of the file header 


Obtain the correct firmware. 




download header 
error [##] 






Deficit of the data header 










File checksum error 




##: Error code 20 to 25. 


Data checksum error 






File header version error 






Data header version error 










Incompatibility of firmware and 
system DIMM board 


Confirm whether the firmware 
is applicable to this printer. 




system download 
error [##] 




# 


#: Error code 40 to 5. 


9. 


Defective system DIMM board 


Replace the system DIMM 
board. 








Improper connection of parallel cable 
between PC and printer 


Check the contact between PC 
and the printer's interface 




^receive 
error [##] 










connector. 


##: Error code 80 or 81. 


Defective parallel cable 


Replace the parallel cable. 








Improper connection of parallel cable 
between PC and printer 






Engine download 
error [##] 




Check the contact between PC 
and the printer's interface 








connector. 


##: Error code 60 or 69. 


Incompatibility of firmware and engine 
board 


Confiini whether the firmware 
conforms to this printer. 








Improper connection of parallel cable 
between PC and printer 


Check the contact between PC 
and the printer's interface 




Message download 
error [##] 




# 


#: Error code 70 ox 7 


7. 


connector. 


Defective LCD controller board 


Replace the LCD controller 
board 



If the corrective action above does not solve the problem, replace engine board (KP-864). See page 

5-22. 



FS-1900 



3-23 



Chapter 4 Operation Overview 



Chapter 4 Contents 



4-1 Electrophotographic system 4-3 

4-1-1 Electrophotographic cycle 4-3 

(1) Main charging 4-4 

Components of drum and main charger unit 4-4 

Amorphus-silicon drum 4-5 

Charging the drum 4-6 

(2) Exposure 4-7 

Laser scanner unit 4-8 

Drum surface potential 4-10 

(3) Development 4-1 1 

(4) Transfer 4-14 

(5) Fusing 4-15 

Fuser unit mechanism 4-16 

(6) Cleaning 4-17 

4-2 Paper feeding system 4-18 

4-2-1 Paper feed control 4-19 

(1) Paper feeding mechanism 4-20 

Drive and paper transfer unit 4-20 

MP tray paper feed unit 4-21 

Fuser unit and face up/down output 4-22 

4-3 Electrical control system 4-23 

4-3-1 Electrical parts layout 4-23 

(1) Circuit boards, sensors and switches 4-23 

(2) Motors, solenoids, clutches and others 4-24 

(3) Drum unit and developer 4-25 

4-3-2 Operation of circuit boards 4-26 

(1) Main board 4-26 

(2) Engine board 4-27 

Eraser lamp control circuit 4-28 

Toner motor control circuit 4-29 

Heater lamp control circuit 4-30 

(3) Sensor board 4-32 

Paper gauge sensing circuit 4-32 

Interlock circuit 4-33 

Paper size detecting circuit 4-35 

(4) Power supply unit 4-37 

(5) High voltage unit 4-38 



4-1 Electrophotographic system 

Electrophotography is the technology used in laser printing which transfer data representing texts 
and graphics objects into a visible image which is developed on the photosensitive drum, finally 
fusing them on paper using the light beam generated by a laser diode. 

This section provides technical details on the printer's electrophotography system. 

4-1-1 Electrophotographic cycle 

The electrophotographic system of the printer performs a cyclic action made of six steps as follows. 
Each step is technically explained in the following sections. 



f 



Drum unit 



(Y) Main charging 



Laser scanner unit 



P [©Cleaning 




Developer 



Paper transfer unit 



Fuser unit 



Figure 4-1-1 Electrophotographic cycle 



4-3 



FS-1900 



(1) Main charging 

Components of drum and main charger unit 



Drum unit 




Main chiarger unit 



© Eraser lamp [board] (KP-752) 
(D Zener board (KP-768) 

(3) Drum board (KP-748) 

(4) Waste toner full sensor [board] (KP-766) 
(D Waste toner full sensor (receiver) 

(g) Cleaning blade 
(7) Cleaning roller 



(s) Cleaner screw 

(9) Drum gear Z36H 

@Drum 

(Q) Main charger shield 

©Grid 

@ Main charger wire 

@ Charger wire cleaner 



Figure 4-1-2 Components of drum and main charger unit 



FS-1900 



4-4 



Amorphus-silicon drum 

The printer use the long lasting amorphous silicon drum. The drum surface is a composite of five 
substances coated in five layers as shown below. 




Drum 



(T) Aluminum base 

(D Carrier block (1 to 3 ^xm thick) 

(3) Photoconductor a-Si 

(4) Primary protection layer (1 ^m thick) 

(5) Secondary protection layer 

Figure 4-1-3 Amorphus silicon drum 

The primary and secondary layers are for protecting the amorphous silicon layer underneath. The 
amorphus silicon layer is of photoconductive, meaning it can be electronically conductive when 
exposed to a (laser) light source to effectively ground electrons charged on its outer surface to the 
ground. This layer is approximately 9 \im thick. 

The carrier block layer lies between the amorphous silicon layer and the aluminum base cylinder 
and prevents the backward electron flow, from the base cylinder to the drum's outer surface, which 
might give adverse effect (possibly "ghost") on the print quality. 



FS-1900 



4-5 



Charging the drum 

The following shows a simplified diagram of the electrophotographic components in relation to the 
engine system. Charging the drum (A) is done by the main charger wire (b). 



Main charging 
output 



High voltage unit 
M CN2-9 



IVICHON* 



Engine board 
YC204-10 




Figure 4-1-4 Charging the drum 

As the drum (A) rotates in a "clean (neutral)" state, its photoconductive layer is given a uniform, 
positive (+) corona charge dispersed by the main charger wire (b). The grid (c) regulates the main 
charging potential so that it is evenly and stably dispersed over the drum (A) at a constant voltage 
level. 

Due to being high-voltage scorotron charging, the main charger wire (b) can get contaminated by 
oxidization after a long run. Therefore, it must be cleaned periodically from time to time using the 
method explained in chapter 3, page 3-9. Cleaning the main charger wire (b) prevents print quality 
problems such as black streaks. 



FS-1900 



4-6 



(2) Exposure 

The charged surface of the drum (A) is exposed to the laser beam scanning from the laser scanner 
unit (b). 




Figure 4-1-5 Exposure 

The polygon motor @ (with polygon mirrors) revolves (27,165 rpm) to reflect the laser beam over 
the drum (A). Lenses (5) and diversion mirror (e) are housed in the laser scanner unit (b). These 
lenses adjust the diameter of the laser beam (670 nm wavelength) so that the laser beam effectively 
focalizes on the drum (A) surface. 



FS-1900 



4-7 



Laser scanner unit 




Figure 4-1-6 Laser scanner unit 



Name 


Description 


(?) Laser diode 


Emits diffused, visible laser. 


(2) Collimator lens 


Aligns the laser beam to the cylindrical lens. 


(3) Cylindrical lens 


Compensates the vertical angle at which the laser beam hits on of the 
polygon mirror segments. 


(4) Polygon motor 


Has six mirror segments around its hexagonal circumference. Each 
mirror corresponds to one scanned line width on the drum when the 
laser beam scans on it. 



FS-1900 



4-8 



Name 


Description 


(5) Primary f-theta lens 


See figure 4-1-7 below. 


(e) Secondary f-theta lens 


The primary (above) and secondary f-theta lenses equalize 
focusing distortion on the area on the drum closer to the edge. The 
effective length of hne (A, B in the figure below) the laser beam draws 
on the drum becomes longer as the laser beam hits closer to the drum 
edge. In the figure 4-1-7 below, distances represented by A and B 
are not the same ((A) > (§)) until the f-theta lenses are provided 
between the polygon mirror and the drum ((A) = (§)). 


(7) Diversion mirror 


Diverts the laser beam vertically onto the drum. Note the diffused 
laser beam finally pinpoints on the drum. 


(s) Protective glass 


Prevent dust, debris, etc., from entering the scanner assembly. 


(9) Sensor mirror 


Bends the very first shot of a laser scan towards the pin photo 
sensor (See figure 4-1-6). 


@) Pin photo sensor 


When shone by the sensor mirror above, this pin photo sensor 
generates a trigger signal. 




Polygon mirror 



Laser diode 



Primary f-theta lens 
Secondary f-theta lens 



Drum 



Figure 4-1-7 F-theta lens 



FS-1900 



4-9 



Drum surface potential 

The laser beam is continually switched on and off depending on the print data. It is on for a black 
(exposed) dot and off for a white (blank) dot. Since the drum surface is evenly charged, whenever 
it is illuminated by the laser beam, the electrical resistance of the photoconductor is reduced and the 
potential on the photoconductor is also lowered. Resulted on the drum surface is an electrostatic 
image which represents the data to print. Note that the area to be printed black has the low potential, 
constituting a "positively exposed" image. 



Laser beam 



Exposed surface potential 
approx. to +20 V 




Charged surface potential 
approx. +240 V 



Drum 



777- 



Figure 4-1-8 Drum surface potential 



FS-1900 



4-10 



(3) Development 




(?) Toner motor 
(g) Toner sensor 
(3) Developing roller 
@ DLP A screw 



(5) DLP B screw 
(D Blade 
(7) Magnet 



Figure 4-1-9 Developer mechanism 



4-11 



FS-1900 



The latent image constituted on the drum (A) is developed into a visible image. The developing 
roller (b) contains a 4-pole (S-N-S-N) magnet core (c) and an aluminum cylinder rotating around 
the magnet core (c). Toner attracts to the developing roller (b) since it is powdery ink made of black 
resin bound to iron particles. The magnetic blade (5) to which an auxiliary magnet piece (e) is 
attached is positioned approximately 0.3 to 0.4 mm above the developing roller (b). It constitutes a 
smooth layer of toner in accordance with the revolution of the roller. 




150 V DC + AC 



Developing bias 
output 



High 

voltage 

unit 

CN2-11 



HVCLK 



Engine board 



YC204-8 



Figure 4-1-10 Development 

The developing roller (b) is applied with the AC-weighted, positive DC power source. Toner (f) on 
the developing roller (b) is given a positive charge. The positively charged toner (f) is then attracted 
to the areas of the drum (A) which was exposed to the laser light. (The gap between the drum (A) and 
the developing roller (b) is approximately 0.3 mm.) The non-exposed areas of the drum (A) repel the 
positively charged toner as these areas maintain the positive charge. The developing roller (b) is 
also AC-biased to ensure contrast in yielding by compensating the toner's attraction and repelling 
action during development. 



FS-1900 



4-12 



A toner sensor is provided within the developer. As the toner supply from the toner container 
dwindles and the toner level lowers in the reservoir, the sensor translates it into an electrical signal 
through its diaphragm, urging the toner motor to feed more toner. 




Developer 



Toner sensor 



Figure 4-1-11 Toner sensor 



FS-1900 



4-13 



(4) Transfer 

The image developed by toner on the drum (a) is transferred onto the paper because of the electrical 
attraction between the toner itself and the transfer roller (b). The transfer roller (§) is negatively- 
biased so that the positively-charged toner is attracted onto the paper while it is pinched by the 
drum (a) and the transfer roller (§). 




Transfer 
bias 
output 


Paper type 


Normal 


Thick 


Thin [ 


Voltage 


-2.3 kV 


-2.6 kV 


-2.1 kV ' 





Figure 4-1 -12 Transfer 

The nominal transfer bias is set to approximately -2.3 kV (limit). Since the ideal potential of the 
transfer bias depends on the thickness of paper, the bias is raised to approximately -2.6 kV for 
thicker paper. On the other hand, the bias current is reduced to -2.1 kV for thin paper. 



FS-1900 



4-14 



(5) Fusing 

The toner on the paper is mohen by heat and pressed into the paper as it passes between the heat 
roller (A) and the press roller (b) in the fuser unit. 



Fusing control temperature 


Paper type 


Temperature 


A4 


Thin 


175 °C 1 


Normal 


1 88 °C 1 


Thick 


190°C 


B5 


Thin 


188°C 


Normal 


190°C 


Thick 


195°C 


A5or 
smaller 


Normal 


188°C 


Thick 


190°C 


Ready 


150°C 



Engine 
board 



AC power 
off /on 
output 




Figure 4-1-13 Fusing 



The heat roller (A) has a heater (infrared) lamp (c) inside which continuously turns on and off by the 
thermistor to maintain the constant temperature on the heat roller (A) surface. The fusing temperature 
is also controlled based on paper types. See the table in the figure above. 

The heat roller (A) is florin coated by to prevent toner from accumulating on the roller after a long 
usage. Care must be taken while handling the heat roller (A) not to scratch the roller surface as 
doing so may result in quality problems. 

The heat roller (A) has four scraping claws (Separators) (5) which are continuously in contact with 
its surface. These claws prevent the paper on which toner has been fused from being wound around 
the heat roller (A) causing paper jam. 

The press roller (b) is made of the heat resistant sihcon rubber. This roller is used to strongly press 
the paper towards the heat roller (A) by means of coil springs. 

The temperature of the heat roller (A) is constantly monitored by the engine board using the thermistor 
and triac. Should the temperature of the heat roller (A) exceed the predetermined value, the thermal 
cutout is activated to effectively disconnect the heater lamp (c) from power. 



FS-1900 



4-15 



Fuser unit mechanism 



To face-down 
output tray 



To face-up 
output tray 
or option devices 




Paper from 
paper transfer unit 
(transfer section) 



(?) Face up/down solenoid 

(2) Thermistor 

(3) Thermal cutout 

(4) Exit sensor 

(5) Fuser board (KP-756) 
(§) Press roller 



(7) Heat roller 
(s) Exit roller 
(9) Exit pulley(s) 
(g) Heat gear Z36 
©Exit gear Z21 
©Idle gear Zl 8 



(§) Idle gear Z28 
@ Separator(s) 
@ Change guide 
@ Heater lamp 



Figure 4-1-14 Fuser unit mechanism 



FS-1900 



4-16 



(6) Cleaning 

After the transferring process, the drum needs to be physically cleaned of toner which is residual 
after the development process. The cleaning blade (A) is constantly pressed against the drum (b) and 
scrapes the residual toner on the drum off to the cleaning roller @. The cleaning roller drives the 
toner to the cleaner screw (5) at one end of which the waste toner bottle is connected to collect the 
waste toner. 




Figure 4-1-15 Drum cleaning and erasing static charge 

After the drum (b) is physically cleaned, it then must be electrically cleaned to neutral state. This is 
necessary to erase any residual positive charges, ready to accept the next uniform charge. The 
residual charge is canceled by exposing the drum (§) to the light emitted from the eraser lamp 
[board] (e) (See figure 4-1-15 above.) in the similar manner as described on page 4-6. This lowers 
the electrical conductivity of the drum (§) surface making the residual charge on the drum (g) 
surface escape to the ground. 



FS-1900 



4-17 



4-2 Paper feeding system 



The paper feeding system picks up paper from the paper cassette, MP tray, or if installed, the paper 
feeder PF-60, feeds it in the printer and delivers in the output tray. Paper is feed at the precise 
timing in synchronization with data processing. The paper feeding system finally delivers the printed 
page to either the face-down or face-up output tray as manipulated by the user. 



The figure below shows the components in the paper feeding system and the paths through which 
the paper travels. The sensors, clutches, solenoids, motor etc., are described in the following pages. 




© Middle feed roller 

(2) MP tray feed roller 

(3) Guide pulley(s) 
@ MP tray 

(5) Paper cassette 
(e) Feed pulley 
(7) Retard roller 



FS-1900 



(s) Feed roller 

(9) Pickup roller 

@ Upper registration roller 

@ Lower registration roller 

@ Transfer roller 

@Drum 

@ Press roller 



Paper from option 
paper feeder PF-60 
orduplexer DU-60 



@ Heat roller 

@ Exit roller 

(g) Exit pulley(s) 

(g) FD roller 

(g) Pinch roller(s) 

@) Face-down output tray 



Figure 4-2-1 Paper feeding components 



4-18 



4-2-1 Paper feed control 

The following diagram shows interconnectivity of the feeding system components including the 
sensors and rollers. The engine board issues various signals in synchronization with the 
electrophotographic process that is executed by the main board. 



11 







,) 'W^ ■€^. 



Fuser board 



Power supply unit 



□ CL 
Q Q 





Sensor 
baord 











z: 
< 


LL 


n 


o 


^ 


UJ 


Q. 


u. 



Engine reiay board 



O 



ir 

Q 

O 



IVIP tray 



High voltage 
unit 



00 Ln -^ Lo CO 



CO 



CM 

o 

CM 

O 

> 



CM 
O 
CM 
O 

> 



CM 
O 
CM 
O 

> 



CM 
O 
CM 
O 

> 



Engine board 



to to 
o o 

CM CM 



CO CO CO CO CO to 

O O O O o o ,, ,, 

CMCNJCM CMCM^OO CM 

>->> > > > -^ -^ 



•«**^( 



: Power train 



(?) Main motor 

(g) MP tray paper sensor 

(3) Registration sensor 

(4) Paper gauge sensor 1, 2 



(5) Exit sensor (9) Feed clutch 

(e) Paper full sensor @ Registration clutch 

(7) MP tray feed solenoid @ Face up/down solenoid 
(§) Middle feed clutch 



Figure 4-2-2 Paper feed control 



FS-1900 



4-19 



(1) Paper feeding mechanism 
Drive and paper transfer unit 



Drive unit 




Paper transfer unit 



(?) Main motor 

(2) Registration clutch 

(3) Feed clutch 

(4) Pickup roller 



(D Feed roller 
(§) Lower registration roller 
(7) Upper registration roller 
(§) Transfer roller 



Figure 4-2-3 Drive and paper transfer unit 



FS-1900 



4-20 



MP tray paper feed unit 



Drive unit 




MP tray 



(D Middle feed clutch @ MP tray feed roller 

@ MP tray feed solenoid @ Middle feed roller 

Figure 4-2-4 MP tray paper feed unit 



4-21 



FS-1900 



Fuser unit and face up/down output 



To face-up 
output tray or 
option device 




@ Heat roller 
@ Press roller 



@ Exit roller 
@ Exit pulley(s) 



(Q) FD roller 

@ Pinch roller(s) 



Figure 4-2-5 Fuser unit and face up/down output 



FS-1900 



4-22 



4-3 Electrical control system 

4-3-1 Electrical parts layout 

(1) Circuit boards, sensors and switches 



© 

(D 
® 
® 
® 
® 
® 
® 
® 

® 




Main board (KP-948) 

System DIMM [board] (KP-893) 

Engine board (KP-864) 

Sensor board (KP-574) 

LCD controller board (KP-738) 

Engine relay board (KP-760) 

APC board (KP-742) 

Pin photo diode sensor [board] (KP-746) 

Fuser board (KP-756) 

Power supply unit 

High voltage unit 

Registration sensor (PH701) 

Paper gauge sensor 1 (PH702) 

Figure 4-3-1 Circuit 



@ Paper gauge sensor 2 (PH703) 
@ Top cover/paper transfer unit interlock switch (SW702) 
@ Left cover interlock switch (SW703) 
@ Top cover switch (SW701) 
@ MP tray paper sensor (PC502) 
@ Option feeder sensor (PC501) 
@) Paper full sensor 
@ Exit sensor 

@) Temperature/humidity sensors 
@ Power switch @ Thermal cutout 

@ Paper size switch (g) Network interface card or 
@ Thermistor serial interface card (Optional) 

boards, sensors and switches 



FS-1900 



4-23 



(2) Motors, solenoids, clutches and others 




(?) Main motor 

(2) Polygon motor 

(3) Cooling fan motor 

(4) Controller unit fan motor 



(5) Face up/down solenoid 

(6) MP feed solenoid 

(7) Middle feed clutch 
(D Feed clutch 



(9) Registration clutch 
@) Heater lamp 
@ AC inlet 



Figure 4-3-2 Motors, solenoids, clutches and others 



FS-1900 



4-24 



(3) Drum unit and developer 




Developer 



(T) Drum board (KP-748) 

(2) Waste toner full sensor [board] (KP-766) 

(3) Waste toner full sensor (receiver) 

(4) Eraser lamp [board] (KP-752) 



(5) Zener board (KP-768) 
(e) Toner sensor 
(7) Toner motor 



Figure 4-3-3 Drum unit and developer 



FS-1900 



4-25 



4-3-2 Operation of circuit boards 
(1) Main board 



Q01 

Digital Transistor 



YC07 



Engine i/F 



VDATAR VDATAN 



EGSI. SCKN 



.EGSO. SBSY, SDIR, EGIRN 



SCK, SO, SEL(0-2) 



SLREADY 



OP24V, 0P5V 



Option I/F 



X'tal (System) 
25.0000 MHz 



X'tal (Video) 
30.2394 MHz 



CXIN 



YC04 




RISC watch connector 



YG10 



[Debugger connector] 
YC09 

DBTXD 



TDO 



TDI,TCK,TMS, HALTN 



i 



DBRXD, DBCLK 



U13 

3.3 V Regulator 

+5 VI I I +3.3 V1 



11 



Q02 



PowerPC 200 MHz 

RISC processor 

(Core ASIC) 



Digital Transistor 
EBA22, EBA10-1 



YC02 



EB0EN1. EBWEN1 



CDET11,CDET12, CDRST1 



EBA22, EBA10-1 



74LV 
32A 



CDCSN2 



Option 

Memory 

card 

slot 



CDET21,CDRST2 



CDWAITN /f4Hc 



CDCSN1 



CDCSN2 



Option 
Hard 
disk 
dirive 
slot 



CDD15-8 U5 EDB31-24 

..rn... ^ - -, 
■ LJ ^^ ^ 

CDD7-0 U6 EDB23-16 



EDB31-16 



YC03 



YS01 



EBCSNO, EBCSN1, EBOENO. EBWENO 



System 

DIMM 

Sloti 

(Code ROM) 



EBCSNO, EB0EN2 



Font 
Mask ROM 



EBCSN1, EB0EN2 



YC01 



OPRSTN 



OPRDY, DMAACKN, lORN. 
lOWN, EBCSN4 



DMAREQ, OPACKN, OPIRN 
EBA15-1 



EBIU Address bus 



API ROM 
Socket 



Option I/F 
KUIO-LV(3.3V) 



EBIU Data bus 



EBD31-0 



DQMLM, DQMLL 

' DQMUU, DQMUM 



IICSCL 
IICSDA 



RASN, CASN, WEN, BA1 , BAO, SDCLKE 



SDRAM Address bus SDA12 



SDA12-0 



U09 
SDRAM 



SDD31-16 



SDA12-0 



SDCSN1-2 



1 



U10 
SDRAM 



lie 

EEPROM 



SDA12-0 



SDD31*0 



SDRAM Data bus 



*l 



Option 

SDRAM 

DIMM 

Slot 



Figure 4-3-4 Main board circuit blocl< diagram 



FS-1900 



4-26 



(2) Engine board 



Engine board 



Sensor 
board 



Power 

supply 

unit 



Engine 
relay 
board 



High 

voltage 

unit 



Eraser lamp |^ 
control 
circuit 



ERASE 
ERDEAD* 



WTNLED 



Waste toner 

full detection 

circuit 



WTONFUL* 

EECLK 
EEDIO 



Paper 

gauge 

sensing 

circuit 



PAPVOL 



CASIZE 



+5V1 , +24V1 , +24V2 



ZCROSS 



THERM 



Thermisor 
blown-out 
detection 



Abnormal 

temperature 

detection 

circuit 



THDEAD* 



HTEMP' _ 
HEATON 



Heater lamp 
control circuit 



AIRTEMR AIRWET 



WETCK1,WETCK2 



VSEREQ* 



SIOUT 



CPU 
{U20i; 



OPRDY* 



Address/Data multiplex bus ADO - AD7 
*^ " 



Address bus A8- A19 



X 



Address bus LAO - LA7 



^ A8 - A1 7 ^ 



RD*, WR*, ALE 



Flash 

ROM 

(U202) 



5VSAVE* 



5VDC 
power 
saver 



SOOUT, SCLKOUT 



SYSCLK 



GAINT 



RESET* 



Reset 

IC 
(U203) 



RESET* 



REGPAR TCOVOP, 
SGOVOP*,FGOVOP* 



HEATON* 



FDPFUL*, EXITPAP* 



FDDR, FUDR 



Driver 



FDON, FUON 



Driver 



MMOTRDY* 
MMOTON, MPFSOL, FEDDR, MIDDR, REGDR 



Gooling 

fan motor 

driver circuit 



FANON* 



FANSPD 



FPRST* 



Toner motor 
control 
circuit 



TMOTON 



TNMOG , 

DLPTYPE, GONTYPE 



TONSGAN 



TNEMP* 

MGHON.TRGHON, RTRGHON*, 

TRVSEL1 ,TRVSEL2, TRVSEL3, 

TRTGHON, HVGLK1, HVGLK2 

J HUNIT*, HANDS* 



FRGS* 



Engine 
gate 
array 

(U204) 



-I-24V1 



3- 

terminal 

regulator 

(U208) 



+5V3 



POLGLK, POLON, 
POLRDY* 



PDIN* 



SAMPLE1*, POWCONT 



LASER* 



BFANON 



OPSGLK, 
OPSDO 



Gontroller ^ 

unit 
fan motor 

driver 

circuit 



OPTSDI 



Bus 

buffer 

(U206) 



OPSELO-2 
OPSEL3-5 



Bus 

buffer 

(U207) 



Scanner 
unit 



Cont- || 
roller 
unit fan 
motor 



OPSDI, OPRDY* 



SYSRES*, SDIR, 

VDF0N1*, PDOUT*, 

20PTRIG, SBSY* 

EGIR, VDF0N1* 



SGLKIN,SOIN 



FPGLK, FPDIR 



FPDATA 



+3.3V1 



Option 
unit 



Main 
board 



Figure 4-3-6 Engine board circuit blocl( diagram 



FS-1900 



4-27 



Eraser lamp control circuit 

CPU (U201) turns on its #59 pin to H and turns Q215 and Q214 on. Current flows through Q214 
and R249, then the eraser lamp, activating the lamp. Current also routes through R251 and R252 as 
bled by R25 1 . Point (a) below is approximately 14.5 V when the eraser lamp is normal. If the eraser 
lamp blows out or the connector is not fitted, current goes through only R25 1 and R252, subsequently 
the potential at point (A) is as high as approximately 24 V. Difference in the potential at point (A) 
where the eraser lamp is normal or not is automatically detected as an error. When anomaly is 
detected with the eraser lamp, the detector circuit turns Q216 on and turns ERDEAD* at #60 pin of 
CPU (U201) to L. This in turn causes CPU (U201) to determine that the eraser lamp is faulty, 
displaying Call service 5300. 



Engine board 




Eraser lamp [board] 



//////// 



Figure 4-3-7 Eraser lamp control circuit 



FS-1900 



4-28 



Toner motor control circuit 

As TMOTON at #15 of gate array (U204) turns to H, Q218 and Q217 turn on, and +24 V reaches 
Q217, R265 and the toner motor, finally driving the toner motor. 

If the toner motor is overloaded by some reasons, an overcurrent may flow through the toner motor 
beyond the predetermined level, turning Q220 on. Q220, when turned on, causes the current from 
the +24 V power supply to flow through Q217, Q220, R267, R268, and to the ground. Consequently, 
approximately 3.9 V (H) develops at point (a), as limited by the combination of R267, R268, and 
DZ206. This voltage is used as TNMOC - toner motor error - which is applied to #17 of CPU 
(U201). Thus, CPU determines the toner motor error and lets Call service 7001 be indicated. 



Engine board 




Figure 4-3-8 Toner motor control circuit 



FS-1900 



4-29 



Heater lamp control circuit 

The heater lamp control circuit turns the heater lamp on and off which is located coaxially inside 
the heat roller. The surface of the roller maintains the constant temperature needed to permanently 
fuse the toner on paper. 

The heater lamp is directly fed with AC primary power (220 - 240 V or 120 V) which is supplied 
from the power supply unit. 



Engine board 



HEATON* 



THERM 



+5V1 



R217: 



R219 



+5V1 



■R233 
:1M 



R228 
1.3k 



+5V1 



+5V1 




"J, 



U205-2 



-AV^ 



Q204 



Jjvi^l 



1 

rn 



f5V1 



U205-1 

1 



-AAA- 



+5V1 



QA201 B 



-vw^t^ 



bjA'^r 



QA201A 



HEATON 4 



Engine 
gate 
array 

(U204) 



HEATON 



HTEMP* 63 



THDEAD 54 



THERM 3 



CPU 
(U201) 

P43/PPG3 



P34/RT04 
/HRQ 



P50/AN0 



AC 



PC 
TRC 



Power supply unit 



Tliermisor 



Heater lamp 



««^UL 



-^sK^ 



^ 



+5V1 



Fuser board 



Thermal cutout 



Figure 4-3-9 heater lamp control circuit 



FS-1900 



4-30 



As change in temperature is detected by the thermistor, CPU U201 adjusts the voltage that is resultant 
of change in temperature, given at pin #3 (THERM) to keep the temperature as constant as possible. 
This voltage is used to continuously switch the fuser lamp on and off. If pin #4 (HEATON) of the 
engine gate array U204 is H level, transistor Q204 (pin #2) turns on, the photo coupler (PC) on the 
power supply unit turns on, and the triac (TRC) turns on, consequently the heater lamp is AC 
powered and lights. The heater lamp continuously turns on and off to maintain the temperature on 
the heater roller at approximately 188 °C (Normal paper, A4), 175 °C (Thin paper, A4), and 190 °C 
(Thick paper, A4) for printing and approximately 150 °C at standby (Ready). Refer to section 
Fusing on page 4-15. 

Abnormal temperature detection circuit 

The thermal cutout device which is connected in series with the heater lamp, constitutes the abnormal 
temperature detection circuit including of comparators U205-2, R217, R219, etc. Pin #5 of the 
comparator U205-2 is continuously given with the voltage by resistors R217 and R219, which 
simulate the voltage given if an abnormally high temperature develops. Pin #6 receives the voltage 
the thermistor detects. For instance, the heater lamp happens not to switch off, the voltage the 
thermistor gives at pin #6 will become unusually high, and as soon as it exceeds the voltage at pin 
#5, pin #7 of the comparator U205-2 output changes to L level. This in turn turns transistors QA201B 
and QA201A on, and turns QA201A (pin #6) to L level. Since pins #6 of the transistor QA201A and 
#2 of transistor Q204 are connected to each other, pin #4 of the engine gate array U204, even 
though it is currently at H level, is enforced to be H level, effectively disabling the heater lamp. Pin 
#7, the output from comparator U205-2, changes to L. Then, it is output to #63 of CPU (U201) 
which in turn determines that an unusual temperature has developed in the fuser, indicating Call 
service 6110. 

Thermistor blown-out detection 

The thermistor is monitored by the combination of comparator U205- 1 , R233, and R238. Extremely 
low potential is applied to pin #3 of U205-1 by means of R233 and R238. Whereas, pin #2 is 
applied with the voltage the thermistor detects. In normal state, as the heater lamp glows, the voltage 
detected by the thermistor is greater than the potential at #3 of U205-1, making the U205-1 output 
to L and sent to #54 (THDEAD) of CPU. 

When the thermistor has blown, pin #2 of U205-1 becomes zero which is well lower than the 
potential at pin #3 of U205-1, the comparator output becomes H, delivering THDEAD at pin #54 of 
CPU. CPU uses this signal to determine that the thermistor is faulty and displays Call service 
6110. 



FS-1900 
4-31 



(3) Sensor board 

Paper gauge sensing circuit 

Paper gauge operates in four levels of paper remaining in the cassette. The height of the paper stack 
in the paper cassette changes the angle of the actuator. At the end of the actuator is a reflecting 
mirror which reflects or interrupts the light emitting from photointerruptor sensors PH702 and 
PH703 accordingly. 

These two sensors generate four digital signals which will be digital- analog-converted and input to 
A/D port of CPU. CPU then issues signals according to the level of the analog signals. The resultant 
signals are used to monitor the amount of paper in the cassette through the network management 
utilities. 



Paper transfer unit 



Sensor board 



Paper gauge 
sensor 1 (PH702) 




Figure 4-3-10 Paper gauge sensor(s) 



FS-1900 



4-32 



Interlock circuit 

The interlock circuit is constituted by SW702, the top cover/paper transfer unit interlock, and SW703, 
the left cover interlock, both mounted on the sensor board. These switches are controlled by the 
actuator which is mechanically activated by the projection on the top cover and the paper transfer 
unit. SW703 and SW702 are connected in series to the +24 V power. Physically opening the top 
cover, left cover, or the paper transfer unit will disconnect the +24 V power, signaling the status to 
the engine board. The top cover switch (SW701) serves only the top cover. 



Top cover 




Left cover 



Top cover/ 
paper transfer 
unit interlock 
switcli (SW702) 



Paper transfer unit 



Top cover 

switcin 

(SW701) 



Projection 



Figure 4-3-11 Interlock system 



FS-1900 



4-33 



The interlock circuit outputs the three different detection signals which are combined in matrix to 
produce various levels of situations regarding the covers. The subsequent status is displayed on the 
message display. 



N.O. 

Top cover/ 

paper transfer 

unit interlock 

switch (SW702) 

Side cover 



COM 




Engine board 



Top cover 




Actuator 



n. 



o 



J 

or 



Paper transfer unit 



Top cover 
switch {SW701) 



Side cover interlock 
switch (SW703) 











Output level |i 


Operator panel message display 


® 


® 


© 


Ready 


H 


L 


H 


Close top cover 


L 


H 


L 


Close top cover 


Close paper transfer unit 


L 


H 


L - 


Close top cover 


Close left cover 


L 


H 


L 


Close top cover 


Close paper transfer unit 


Close left cover 


L 


H 


L 1 


Close paper transfer unit 


Close left cover 


L 


L 


L 


Close paper transfer unit 


L 


L 


L 


Close left cover 


L 


L 


H 


NOTE: Message display priority is from left to right. 





Figure 4-3-12 Interlock circuit 



FS-1900 



4-34 



Paper size detecting circuit 

The three paper size switches (SWl, SW2, SW3) are activated according to the positioning of the 
paper size dial on the paper cassette. An analog signal is generated by the combination of the paper 
size switches, which are put in comparison with the voltage/paper size table referenced by the 
paper size detecting circuit. The paper size is detected. 



Paper size 
switch 




Paper size dial 



Cassette 



Figure 4-3-13 Paper size detecting circuit 



FS-1900 



4-35 



The paper size dial has predetermined patterns of activating the paper size switches using concaves 
and convexes according to paper sizes. SWl, SW2, and SW3 produce corresponding signals for 
paper sizes. These patterns are translated into analog voltages and sent to the engine board on a 
single line. The signals are analog-digital-converted on the engine board. 

Sensor board 




Engine board 




1 

I 



C246 R238 



GND GND 



SWl 



SW2 



A5 A4 



|SW3 




Paper size dial 



Paper size switch 



Paper size switch 




D/A converted 
output voltage 




Paper cassette 



Paper size 



Cassette 

not Custom 
installed 



Off 
Off 



Off 

Off 



Off 



On 



Letter Legal A4 



A5 



B5 



Off 

On 



Off 
On 



On 
Off 



On On 
Off On 



On 



Off 



Off 



On Off 



OV 1.94V 1.58V 1.19V 0.42 V 2.28 V 2.92 V 
Approximately 



See 

note 

below. 



On 
On 



On 



3.22 V 



Paper size dial 




Concave 
(Function Off) 

Convex 
(Function On) 



Note: Toner install mode cancellaton signal (See page 3-14) 



Figure 4-3-14 Paper size detecting circuit 



FS-1900 



4-36 



(4) Power supply unit 

The power supply unit produces DC power outputs from the AC input. The high voltage bias 
generator circuit is mounted on a separate unit. 

A simplified schematic diagram is shown below. 



Power supply unit 



Heater 
lamp 



„X Thermal 
\ cutout 



Thermistor 



Power Current 
switch fuse 




Transformer 



Zero cross 
signal 
generation 
circuit 



Enargy- 

saving 

circuit 


24 V DC 
rectifier/ 
smoothing 
circuit 



5VDC 
rectifier/ 
smoothing 
circuit 



Photo- 
coupler 



Photo- 
coupler 



Triac 



Photo- 
Triac 



Over 

voltage/ 

current 

detection 

circuit 



Engine 
board 



SLEEP* 



-f24V1 



GND 



+5V^ 



GND 



ZCROSS 



H EATON* 



THERM 



FDFUL 



EXITPAP^ 
FDDR 
FUDR 




Figure 4-3-15 Power supply unit circuit block diagram 



FS-1900 



4-37 



(5) High voltage unit 

High voltage unit contains main charger unit, transfer roller high voltage output circuit which 
generates the developer bias. It also contains MP tray paper sensor and option feeder sensor. 



High voltage board 



Engine board 



+24V2 



RTRCHON* 



MCHON* 



TRCHON* 



TRVSEL3* 



TRVSEL2* 



TRVSELr 



HVCLK 



GND 



+5V2 



HUNIT* 



HANDS* 



High voltage output circuit 



1 



Control 
and 
driver 
circuit 



r 



T 




Control 
and 
driver 
circuit 




Transfer bias 
output 

positive voltage 
circuit 

T 



Driver 
circuit 



PGND 



Rectifier 
circuit 



Main charger unit 



Developer 
(Magnet roller) 




Transfer roller 



Sensor circuit 



Option 
feeder 
sensor 




MP tray 

paper 

sensor 




I 



MP tray 



Paper 



Figure 4-3-16 High voltage unit circuit block diagram 



FS-1900 



4-38 



Chapters Disassembly 



Chapter 5 Contents 



5-1 General instructions 5-3 

5-1-1 Screw/hardware 5-3 

5-1-2 Before starting disassembly 5-3 

5-2 Disassembly 5-4 

5-2-1 Removing tine developer 5-4 

(1) Removing the developer 5-4 

5-2-2 Removing the paper transfer unit 5-6 

5-2-3 Removing the main charger unit 5-7 

5-2-4 Removing the operator panel and outer covers 5-8 

(1) Removing the operator panel 5-8 

(2) Removing the top cover/face-down output tray 5-9 

(3) Removing the right cover 5-10 

(4) Removing the left cover 5-11 

5-2-5 Removing the drum unit 5-12 

5-2-6 Removing the pickup roller and feed roller 5-13 

5-2-7 Removing the MP paper feed unit 5-15 

5-2-8 Removing the transfer roller 5-17 

5-2-9 Removing the controller unit and the principal circuit boards 5-18 

(1) Removing and opening the controller unit 5-18 

(2) Removing the engine board and power supply unit 5-22 

(3) Removing the main board 5-24 

(4) Removing the high voltage unit 5-25 

(5) Removing the sensor board 5-26 

5-2-10 Removing the drive unit and main motor 5-27 

5-2-11 Removing and splitting the fuser unit 5-29 

(1) Removing the separators 5-32 

(2) Removing the heater lamp 5-33 

(3) Removing the heat roller 5-34 

(4) Removing the thermistor and the thermal cutout 5-35 

(5) Removing the press roller 5-36 

5-2-12 Removing the laser scanner unit 5-37 



5-1 General instructions 

This chapter provides the procedure for removal and replacement of field replacement components. 
For other components not explained in this chapter, it is recommended that your refer to the diagrams 
in the Parts Catalog as a supplemental reference to this chapter. It features all the part drawings and 
help you disassemble or refit the parts in the printer. 

When replacing of a component, reverse the procedure for the removal procedure explained in this 
chapter. 

WARNING To avoid injury caused by electric shock, make sure that AC power is removed 
5-1-1 Screw/hardware 



CAUTION 



A 



When securing a self-tapping screws, align it with the thread carefully. First turn 
it counterclockwise, then slowly clockwise. Do not overtighten. In case the self- 
tapped thread is damaged, the whole part may have to be replaced with a new 
part. 



5-1-2 Before starting disassembly 

Before proceeding, unplug the power cord from the printer and the power supply. 



WARNING 

A 



CAUTION 



A 



Never attempt to operate the printer with components removed. 



The printer use electrostatic sensitive parts inside (circuit boards, laser scanner 
unit, etc.). Provide an antistatic (discharging) device, such as a wrist strap, that 
can effectively discharge your body before touching those components. 



FS-1900 



5-3 



5-2 Disassembly 

5-2-1 Removing the developer 
(1) Removing tlie developer 



CAUTION 



A 



When if installing or removing the developer, do not let the magnet roller touch 
any part in the printer. 

When handling developer, use both hands. Do not press the bottom of the 
developer. 



1 . Open the top cover. 

2. Remove the toner container. 

3. Disconnect the developer connector (?). 

4. Remove the developer (g) from the printer while sliding the developer lock lever (s) frontwards. 




Figure 5-2-1 Removing the developer 



FS-1900 



5-4 



5. Gently flip down the magnet roller protective cover (4). 




Figure 5-2-2 Closing the magnet roller protective cover 



NOTE 



After removing the developer, seal it in the protective bag and place it on a flat 
surface. Do not place the developer in a dusty area. If you ship the developer, 
pack it in the shipping container specifically supplied with the printer. See section 
Shipping the developer on page 3-13. Also do not touch the developing roller (5). 
Do not place floppy disks near the developer. 



FS-1900 



5-5 



5-2-2 Removing the paper transfer unit 

1. Draw the paper transfer unit (J) while pressing the buttons in the direction of arrow (A). 




Figure 5-2-3 Removing the paper transfer unit 



FS-1900 



5-6 



5-2-3 Removing the main charger unit 

1 . Pull the main charger unit (T) upwards while pushing main charger release lever (g). Then, pull 
the main charger unit (l) frontwards. 




Figure 5-2-4 Removing the main charger unit 



FS-1900 



5-7 



5-2-4 Removing the operator panel and outer covers 
(1) Removing the operator panel 

1 . Open the top cover (?) and MP tray (g). 

2. Unlatch two hooks (5). 

3. Pull the operator panel (4) towards the front. 




Figure 5-2-5 Removing the operator panel 



FS-1900 



5-8 



(2) Removing the top cover/face-down output tray 

1 . Open the top cover (l). 

2. Remove two screws (2). 

3. Remove the top cover/face-down output tray (3) while pressing it the direction arrows (4) 
(backwards). 




Figure 5-2-6 Removing the top cover/face-down output tray 



FS-1900 



5-9 



(3) Removing the right cover 

1. Remove the operator panel. See page 5-8. 

2. Unlatch the four snaps (\) and three hooks (g) on the chassis. Remove the right cover (§). 




Figure 5-2-7 Removing the right cover 



FS-1900 



5-10 



(4) Removing the left cover 

1. Unlatch the four snaps (T) and three hooks (g) on the chassis. Remove the left cover (3). 




Figure 5-2-8 Removing tlie left cover 



5-11 



FS-1900 



5-2-5 Removing the drum unit 

1. Remove the paper cassette and the paper transfer unit. See page 5-6. 

2. Remove the developer unit. See page 5-4. 

3. Remove the waste toner bottle. See page 3-7. 

4. Remove the drum unit (?) while pressing the drum lock (g). 




Figure 5-2-9 Removing the drum unit 



FS-1900 



5-12 



5-2-6 Removing the pickup roller and feed roller 

1 . Remove the paper transfer unit. See page 5-6. 

2. Turn the paper transfer unit (T) over. 

3. Detach the release holder (g) by sliding it while pressing the projections (A). 

4. Remove the feed roller assembly (5) while pressing it in the direction of arrow (b). 




Figure 5-2-10 Removing the feed roller assembly 



5-13 



FS-1900 



5. Remove the feed bracket cover (4) while unlatching three snaps (s). 

6. Remove the pickup roller (6) and the feed roller (7). 




Figure 5-2-11 Remove the pickup roller and feed roller 



CAUTION 



A 



Pickup gear Z32S (s) is installed of the inside the one way clutch (§). When 
refitting pickup gear Z32S (§), face the one way clutch (9) face to the feed bracket 
cover (4). 



FS-1900 



5-14 



5-2-7 Removing the MP paper feed unit 

1. Remove the paper transfer unit. See page 5-6. 

2. Remove the developer. See page 5-4. 

3. Remove three connectors (T). 

4. Remove the engine relay board (2) while unlatching the latches (§). 




Figure 5-2-12 Removing the engine relay board 



5-15 



FS-1900 



5. Pull the MP tray paper feed unit (4) out while unlatching two latches (s) off of points (A). 




Figure 5-2-13 Removing the MP paper feed unit 



FS-1900 



5-16 



5-2-8 Removing the transfer roller 

CAUTION Do not touch the transfer roller (?) (sponge) surface. Oil and dust (particles of 

A paper, etc.) on the transfer roller (l) can significantly deteriorate the print quality 

(white spots, etc.). 

1 . Draw the paper transfer unit from the printer. 

2. Remove the paper chute (g). 

3. Remove the transfer roller (T). 




Figure 5-2-14 Removing the transfer roller 



5-17 



FS-1900 



5-2-9 Removing the controller unit and the principal circuit boards 

(1) Removing and opening the controller unit 

1. Remove the top cover/face-down output tray. See page 5-9. 

2. Remove the right and left covers. See page 5-10 and 5-11. 

3. Remove the four connectors (?) from the controller unit (g) left side. 

CAUTION Draw the connector straight to remove. If you draw the connector while it is 

A slanted, the receptacle may be damaged. 




Figure 5-2-15 Removing the connectors from controller unit left side 



FS-1900 



5-18 



4. Remove the two connectors (5) from the controller unit (g) right side. 




Figure 5-2-16 Removing the connectors from controller unit right side 



FS-1900 



5-19 



5. Remove three screws (4). 

6. Remove frame unit (s) while releasing the projections from the catches on the frame unit (5). 




Figure 5-2-17 Removing the controller unit form the frame unit 



FS-1900 



5-20 



7. Remove two screws (§). 

8. Remove the main board (t). 

9. Remove four screws (s). 

10. Remove the controller unit lid (§) from the controller unit (2). 




Figure 5-2-18 Opening the controller unit 



5-21 



FS-1900 



(2) Removing the engine board and power supply unit 

1. Remove and open the controller unit. See pages 5-18. 

2. Remove two connectors (l) from the engine board (g). 

3. Remove five screws (s). 

4. Remove the engine board (g). 




Figure 5-2-19 Removing the engine board 



FS-1900 



5-22 



5. Remove the power switch rod (4). 

6. Remove one screw (5), grounding wire terminal (§), and lock washer (7). 

7. Remove three screws (s). 

8. Remove the power supply unit (9) from the power supply unit cover @. 




Figure 5-2-20 Removing the power supply unit 



FS-1900 



5-23 



(3) Removing the main board 



CAUTION 



A 



Before removing the main board, the memory card must be removed first. 
However, do not remove the memory card while power is on. If the memory card 
is removed (or inserted) while the printer is on, damage could result in the printer's 
electronics as well as the memory card. 



1. Turn the power switch off. 

2. Remove the memory card that may be inserted in the memory card slot (l) at the left side of the 
printer. 

3. Remove two screws (5). 

4. Pull the main board (s) all the way out of the printer. 




Figure 5-2-21 Removing the main board 



FS-1900 



5-24 



(4) Removing the high voltage unit 

1. Remove the top cover and left covers. See pages 5-9 and 5-11. 

2. Remove the high voltage unit (7) while unlatching two latches (g). 

3. Remove two connectors (§), from the high voltage unit. (l). 




Figure 5-2-22 Removing the high voltage unit 



FS-1900 



5-25 



(5) Removing the sensor board 

CAUTION Draw the connector straight to remove. If you draw the connector while it is 

1. Remove the drum unit. See page 5-12. 

2. Remove the high voltage unit. See previous page. 

3. Remove two connectors (?)■ 

4. Remove the high voltage unit cover (g). 

5. Remove the sensor board (s) while unlatching two latches (A). 



Connector 




Connector 



Receptacle 



Figure 5-2-23 Removing tlie sensor board 



FS-1900 



5-26 



5-2-10 Removing the drive unit and main motor 

CAUTION Draw the connector straight to remove. If you draw the connector while it is 

A •■— 

1. Remove the paper cassette and the paper transfer unit. See page 5-6. 

2. Remove the top cover/face-down output tray. See page 5-9. 

3. Remove the left and right covers. See pages 5-10 and 5-11. 

4. Remove two connectors (T). 

5. Remove three connectors (g) of the drive unit (s). 

6. Remove five screws (4) and the ground wire terminal (s). 

7. Remove the drive unit (s) from the frame unit. 



Receptacle 




Figure 5-2-24 Removing drive unit 



5-27 



FS-1900 



8. Remove four screws (§). 

9. Remove the main motor (?) from the drive unit (s). 




Figure 5-2-25 Removing the main motor 



FS-1900 



5-28 



5-2-11 Removing and splitting the fuser unit 



WARNING The fuser unit is hot after the printer was running. Wait until it cools down. 



A 



1 . Remove three connectors (T). 

2. Remove two screws (5). 

3. Remove the fuser unit (5) from the frame unit. 




Figure 5-2-26 Removing the fuser unit 



5-29 



FS-1900 



4. Remove the rear cover (4) and the spring (5). 

5. Remove the solenoid actuator (§). 

6. Remove the change guide (j). 
1 . Remove one connector (s). 




Figure 5-2-27 Removing the rear cover and cliange guide 



FS-1900 



5-30 



8. Remove two screws (9). 

9. Split the fuser unit @. 




Figure 5-2-28 Splitting the fuser unit 



5-31 



FS-1900 



(1) Removing the separators 

WARNING The separators are extremely hot immediately after the printer was running. Allow 

1. Remove and split the fuser unit. See page 5-29. 

2. Remove the upper exit guide (l) while unlatching three latches (g). 

3. Remove the exit pulley (s). 

4. Hold the separator (4) upright and remove the separator (4) and the separator spring (5). 




Figure 5-2-29 Removing the separators 



FS-1900 



5-32 



(2) Removing the heater lamp 



A 



CAUTION 



A 



WARNING The heater lamp is extremely hot immediately after the printer was running. Allow 
substantial period of time until it cools down. 

The heater lamps are fragile. Use extreme care when handling not to drop or 
break. 

Do not directly touch on the heater lamp. Finger prints on the heater lamp's outer 
surface can prevent proper fusing of toner on paper. When holding the heater 
lamp, hold the ceramic parts of heater lamp at both ends. 

When refitting the heater lamp, direct the wattage making side facing the gear 
side. 

1. Remove and split the fuser unit. See page 5-29. 

2. Remove the lamp support (T). 

3. Remove one screw (2) then remove the lamp holder (3). 

4. Remove the heater lamp (4) from the heat roller (5). 



Gear 




Figure 5-2-30 Removing the heater lamp 



5-33 



FS-1900 



(3) Removing the heat roller 

WARNING The heat roller is extremely hot immediately after the printer was running. Allow 

A a substantial period of time until it cools down. 

1. Remove and split the fuser unit. See page 5-29. 

2. Remove the heater lamp. See the previous page. 

3. Remove the separators. See page 5-32. 

4. Pull up both heat R bush (?) and heat L bush (g) at the same time. 

5. Remove heat gear Z36 (s), heat R bush (l), and heat L bush (g) from the heat roller (4). 




Figure 5-2-31 Removing the heat roller 



FS-1900 



5-34 



(4) Removing the thermistor and the thermal cutout 

1. Remove and split the fuser unit. See page 5-29. 

2. Remove the heater lamp. See page 5-33. 

3. Remove the heat roller. See previous page. 

4. Remove one screw (l). 

5. Remove the thermistor (g). 

6. Remove two screws (s) and then remove cord plate (4). 

7. Remove one screw (s) and the heater wire terminal ©. 

8. Remove the thermal cutout (j). 




Figure 5-2-32 Removing the thermistor and thermal cutout 



FS-1900 



5-35 



(5) Removing the press roller 

WARNING The press roller is extremely hot immediately after the printer was running. Allow 

A -— " 

1. Remove and split the fuser unit. See page 5-29. 

2. Remove the press roller (?) from the fuser unit (g). 




Figure 5-2-33 Removing the press roller 



FS-1900 



5-36 



5-2-12 Removing the laser scanner unit 

1. Remove the top cover/face-down output tray. See pages 5-9. 

2. Remove two connectors (T). 

3. Remove four screws (2). 

4. Remove the laser scanner unit (s) from the frame unit. 




CAUTION When refitting the laser scanner unit, fix the four screws in the order indicated 

above. 

Figure 5-2-34 Removing the laser scanner unit 



FS-1900 



5-37 



Chapter 6 Troubleshooting 



Chapter 6 Contents 



6-1 Troubleshooting 6-4 

-1 General error handling 6-4 

(1) Maintenance messages 6-4 

(2) Error messages 6-7 

-2 Diagnostic (Service error messages) 6-1 1 

(1) 0420 - Option paper feeder PF-60 communication error 6-1 1 

(2) 0440 - Option sorter SO-60 communication error 6-1 1 

(3) 0460 - Option duplexer DU-60 communication error 6-12 

(4) 1210 - Option duplexer DU-60 side registration error 6-12 

(5) 2000 - Main motor error 6-13 

(6) 2600 - Option bulk paper feeder PF-8E motor error 6-14 

(7) 2610 - Option paper feeder PF-60 (Top) paper feed motor error 6-14 

(8) 2620 - Option paper feeder PF-60 (Middle) paper feed motor error 6-14 

(9) 2630 - Option paper feeder PF-60 (Bottom) paper feed motor error 6-14 

(10) 4000 - Laser scanner unit (Polygon motor) error 6-15 

(11) 4200 - Laser scanner unit (Pin photo diode sensor) error 6-16 

(12) 5300 - Eraser lamp error 6-17 

(13) 6000 - Fuser unit error 6-18 

(14) 6020 - Abnormal high temperature error 6-19 

(15) 6400 - Zero cross signal error 6-20 

(16) 7001 - Toner motor error 6-20 

(17) 7350 -Toner refreshing mode error 6-21 

(18) 8010 - Option bulk paper stacker HS-8E motor error 6-21 

(19) FO - Main board or LCD controller board error 6-21 

(20) F010 - System DIMM [board] error 6-21 

(21) F020 - Main or expanded memory error 6-22 

(22) F030 - General failure 6-22 

(23) F040 - Communication error 6-22 

(24) F070 - Flash ROM error 6-22 

-3 Other problems 6-23 

(1) False "Close paper transfer unit" 6-23 

(2) False "Close top cover" 6-23 

(3) False "Close left cover" 6-24 

(4) Defective waste toner box detecting 6-24 

(5) Defective paper jam detecting 6-25 

(6) Defective paper gauge sensing 6-25 

(7) Defective paper size detecting 6-25 

(8) Defective message displaying (LCD) 6-26 

(9) Defective face up/down solenoid operating 6-27 



6-1-4 Circuit board terminai voitages 6-28 

(1) Engine board 6-28 

6-1-5 Assignment of circuit board connector pins 6-34 

6-1-6 Print quality problems 6-35 

(1) Completely blank printout 6-36 

(2) All-black printout 6-37 

(3) Dropouts 6-38 

(4) Black dots 6-39 

(5) Black horizontal streaks 6-39 

(6) Black vertical streaks 6-40 

(7) Unsharpness 6-41 

(8) Gray background 6-42 

(9) Dirt on the top edge or back of the paper 6-43 

(10) Undulated printing at the left edge (scanning start position) 6-44 

Repetitive defects gauge 6-45 

6-1-7 Correcting a paper jam 6-46 

(1) Jam in the rear cover 6-46 

(2) Jam inside the printer 6-47 



6-1 Troubleshooting 



6-1-1 General error handling 



(1) Maintenance messages 



Message 


Corrective action 


Add paper 

(paper source) 


The paper has run out. Supply paper according to the paper source 
displayed (paper cassette, MP tray, or option paper feeder). 
Messages indicating the printer status {Ready , Please wait 
Processing*, Waiting, and FormFeed Time Out *) are 
displayed alternately. 

* These messages will not appear if the number of copies is set to 
2 or more. 


Check waste 
toner box 


The waste toner box is not installed. Replace the old waste toner 
box with the new one which is included in the TK-50 toner kit. 
The message will also be shown if the waste toner box has become 
full. The waste toner box should be replaced when the message 
display eventually shows Toner low TK-50. See section Toner 
container replacement on page 3-5. 


Clean printer 
Press GO 


Clean the inside of the printer, according to section 3-1-3 Cleaning 
the printer on page 3-8. This message will be displayed when 
replacing the toner container after the message Replace toner 
TK-50 has been displayed. After cleaning the inside of the printer, 
press the GO key and the printer will be ready for printing. If 
Auto Continue is set to On, printing will be automatically resumed 
after a preset period of time. 


Close Duplexer 
rear cover 


Open the option duplexer rear cover, then close tightly. 


Face-down tray 
paper full 


The face-down output tray has become full (approximately 250 
pages). Remove all printed pages from the face-down output tray. 
When the printer senses that the face-down output tray is empty 
again, it will continue printing into the face-down output tray. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-4 



Message 


Corrective action 


Load Cassette # 

(paper size)/(paper type)* 

*(paper size) and (paper type) 
are displayed flashing 
alternately. 


Paper whose size watches the size embedded in a print job is empty. 
Set paper into the paper source as displayed on the operator panel, 
and press the GO key to restart printing. The paper source number 
(#) is only displayed when there is an optional paper feeder installed. 
If you want to print from an alternative paper source press the a 
key or v key to display Use alternative ? and you can change 
to another paper source. Further, you can change the paper source 
by pressing the GO key. 

After selecting a paper source and pressing the IVIENU key. Paper 
handling > appears. By pressing the > key, the paper type setting 
menu appears. After setting the correct paper type, press the ENTER 
key and printing starts. 


Load MP tray 

(paper size)/(paper type) 

*(paper size) and (paper 
type) are displayed flashing 
alternately. 


There is no paper cassette (paper size and paper type) that matches 
the size embedded in a print job. Printing is done from the MP tray. 
Set paper into the MP tray that matches the paper size and type 
shown on the display and press the GO key to restart printing. 
If you want to print from an alternative paper source, press the a or 
V key to display Use alternative? and you can change to 
another paper source. Further, you can change the paper source by 
pressing the GO key. 

After selecting a paper source and pressing the IVIENU key. Paper 
Handling > appears. By pressing the > key, the paper type setting 
menu appears . After setting the correct paper type, press the E NTE R 
key and printing starts. 


Missing 
duplex drawer 


The duplex drawer is either not installed or incorrectly inserted. 
Insert the duplex drawer securely. 


Close sorter 
rear cover 


Open the stacker cover, then close tightly. 


Close 
stacker cover 


Open the sorter rear cover, then close tightly. 


Option interface 
Error 


A failure has occurred with the (option) network interface card. 
Check the (option) network interface card installed on the printer. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-5 



Message 


Corrective action 


Sorter tray ## 
paper full 


The sorter tray indicated by # is now full. Remove the paper from 
the tray. 


Close paper 
transfer unit 


Open the paper transfer unit, then close tightly. 


Paper jam 

mmmmm 


Open the top cover or the paper transfer unit and correct the paper 
jam (or paper mis-feeding in the cassette). The location of the paper 
jam is also indicated in place of the # 's. On-line help messages 
which are useful for correcting the paper jam will be displayed by 
pressing the Q key. See section 6-1-7 Correcting a Paper Jam on 
page 6-48. 


Remove paper 
sorter tray ## 


There is still paper in the option sorter's tray indicated by # when the 
power was turned on or the sorter's mode was switched. Remove 
all the paper inside the sorter. 


Replace toner 
Clean printer 


Replace the toner container using a new toner kit. The printer does 
not operate when this message is displayed. See section Toner 
container replacement on page 3-5. 


Close 
Left cover 


Open the left cover, then close tightly. 


Toner low 
TK-50 


Replace the toner container using a new toner kit. See section Toner 
container replacement on page 3-5. 


Close 
Top cover 


Open the top cover, then close tightly. 


Warning 
image adapt 


Printing job cannot be done in current resolution because there is 
not enough memory. Try adding more memory or change resolution. 


Warning 
Low memory 


The printer memory is running low due to the number of fonts and 
macros downloaded. Print a status page to see how much user 
memory is left, and try deleting unnecessary fonts and macros. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-6 



(2) Error messages 



Message 


Corrective action 


Call service 
person FO 


The ATTENTION indicator turns on and the READY indicator goes 
off. Indicates a problem with the controller and the operator panel. 
Call a service person. The printer does not operate when this message 
is displayed. (Refer to section 6-1-2 Diagnostic (Service error 
message) on page 6-11.) 


Call service 
#### 


The Al 1 ENTION indicator turns on. Indicates a controller error. Call 
a service person. The printer does not operate when this message is 
displayed. (Refer to section 6-1-2 Diagnostic (Service error message) 
on page 6-11.) 


Call service 
mm -.0123456 


The Al 1 ENTION indicator turns on. Indicates a mechanical error. 
Call a service person. 0123456 indicates the number of printed pages. 
(Refer to section 6-1-2 Diagnostic (Service error message) on page 
6-11.) 


File not found 
Press GO 


VMB: A VMB tray that was specified for output does not contain any 
jobs, or the VMB tray is not being used. Confirm the VMB tray. 
If Auto Continue is set to On, printing will be automatically 
resumed after a preset period of time. Refer to printer's User 's Manual. 


Format error 
Memory Card 


This message appears when the printer is in the ready state and the 
memory card (CompactFlash) is not formatted, and therefore cannot 
be read or written. Refer to printer's User's Manual. 


Format error 
Hard disk 


Initialization (foiiiiatting) of the hard disk is required. Initialize the 
hard disk (Microdrive). Refer to printer's User's Manual. 


Hard disk errorii 
Press GO 


Look at the error code given in place of ## and refer to the 

corresponding description given below. 

01: Hard disk (Microdrive) format error. If this error recurs even if 

the power has been turned off and then on, reformat the hard disk. 

02: The disk system is not installed. Recheck the requirements for 

using the system and the devices. 

04: There is no available hard disk (Microdrive) space. Delete 

unnecessary files, etc., in order to free up space. 

05: The specified file does not exist in the hard disk (Microdrive). 

06: There is no memory available to the hard disk (Microdrive) system. 

Increase the available memory. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-7 



Message 


Corrective action 


Hard disk error## 
Press GO 


1 0: Formatting is not possible because host data is being spooled on 

the hard disk (Microdrive). Wait until the hard disk is ready, and then 

format. 

85: VMB. Alias error (The alias setting was lost, or the VMB tray 

corresponding to the alias does not exist.) Set alias again. 

97: Code job. The number of permanent code job reached the limit 

value, and no more can be saved. Either delete some unnecessary jobs, 

etc., or increase the limit. 

99: A print job for the specified ID does not exist in the hard disk 

(Microdrive). 


I/F occupied 


This message is displayed when you attempt to use the printer's operator 
panel to change the environmental settings on the interface from which 
data are presently being received. 


ID error 


The ID entered for a private job, or a stored job is not correct. Check 
the ID that is set using the printer driver. 


Insert the same 
memory card 


You have inserted a wrong memory card (CompactFlash) when the 
Insert again message was displayed. Remove the wrong memory 
card from the printer's memory card slot and insert the correct memory 
card. The printer again reads it from the beginning of the data. 


KPDL Error ## 
Press GO 


PostScript error has occurred and current print processing cannot 
continue. To print out an error report, display > Print KPDL errs 
from the menu selection system, and select On. Press the GO key to 
resume printing. You can abandon printing by the CANCEL key. 
If Auto Continue is set to On, printing will be automatically resumed 
after a preset period of time. Refer to printer's User's Manual. 


Memory card err 
Insert again 


The memory card (CompactFlash) is accidentally removed from the 
printer's memory card slot during reading. If you continue reading the 
memory card, insert the same memory card into the slot again. The 
printer again reads it from the beginning of the data. 
Note: We recommend that you follow the reading procedure from the 
beginning to ensure correct reading of the memory card. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-8 



Message 


Corrective action 


Memory overflow 
Press GO 


The total amount of data received by the printer exceeds the printer's 
internal memory. Try adding more memory (expansion DIMM). Press 
the GO key to resume printing. You can abandon printing by the 
CANCEL key. If Auto Continue is set to On, printing will be 
automatically resumed after a preset period of time. Refer to printer's 
User's Manual. 


MemoryCard err## 
Press GO 


This message appears when an error occurred during access to the 

memory card (CompactFlash) using the PRESCRIBE 2e RWER 

command or from the printer's operator panel. Look at the error code 

given in place of ## and refer to the corresponding description given 

below: 

01: The memory card (CompactFlash) does not meet the requirement. 

This memory card cannot be used by this printer. Insert a memory 

card which complies with the requirements. (See section 1-1-2 

Available option memory/device on page 1-6.) 

02: The memory card is not installed. Check the requirements for 

using the memory card. 

04: The capacity of the memory card is insufficient. Clean up files. 

05: Specified file not found on the memory card. 

06: Insufficient printer memory to support a memory card. Expand 

printer memory. 


Paper path error 


There is no cassette in the feeder, or the cassette is not inserted 
properly. When two or more option feeders are installed and the lowest 
one is selected, the same message will appear if any of the upper 
feeder cassettes and the printer cassette is improperly installed. 
The data transferred to the printer was too complex to print on a page. 


Print overrun 
Press GO 


Press the GO key to resume printing. (The page may break in some 

pages.) You can abandon printing by the CANCEL key. 

Note: After this message has been displayed. Page protect mode will 

be On. To maintain optimum use of memory during printing, display 

>Page protect from the operator panel, and re-select Auto. Refer 

to printer's User's Manual. 

If Auto Continue is set to On, printing will be automatically resumed 

after a preset period of time. Refer to printer's User's Manual. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-9 



Message 


Corrective action 


RAM disk error ## 
Press GO 


Look at the error code given in place of ## and refer to the 

corresponding description below. 

01: Abnormal format. Try turning the power off and on again. 

02: RAM DISK mode is Off. Turn RAM DISK mode On. 

04: No disk space. Clean up files. 

05: Specified file not on disk. 

06: No insufficient printer memory to support RAM disk. Expand 

printer memory. 


Virtual mail 
box fail 


The storage area for the VMB is full. Purge accumulated VMB data 
by printing or deleting them. 



^^ : Alarm buzzer sounds when an error occurs. Press the CANCEL key to stop the alarm buzzer. 



FS-1900 



6-10 



6-1-2 Diagnostic (Service error messages) 

The printer does not operate when a message beginning with "Call service ####" or "Call 
service person FOii" is displayed. The message is categorized as follows: 

(1) 0420 - Option paper feeder PF-60 communication error 



Meaning 


Suggested causes 


Corrective action 


Communication error 
between engine board 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


and option paper 
feeder PF-60. 


Blown-out fuse (F202) on the engine board. 
Improper installation between printer and option 
paper feeder. 


Follow installation 
instruction carefully 
again. 




Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harness 
(S02400). 




Improper connector insertion. 


Remedy. 




Defective option paper feeder PF-60. 


Refer to option paper 
feeder PF-60' s Service 
Manual. 



(2) 0440 - Option sorter SO-60 communication error 



Meaning 


Suggested causes 


Corrective action 


Communication error 
between engine board 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5- 


and option sorter 
SO-60. 


Blown-out fuse (F202) on the engine board. 


22. 


Improper installation between printer and option 
sorters. 


Follow installation 
instruction carefully 
again. 




Improper connector insertion. 


Replace main board 




Defective main board (KP-948). 


(KP-948). See page 5- 

22. 




Defective option sorter SO-60. 


Refer to option sorter 
SO-60's Service 
Manual. 



6-11 



FS-1900 



(3) 0460 - Option duplexer DU-60 communication error 



Meaning 


Suggested causes 


Corrective action 


Communication error 
between engine board 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


and option duplexer 


Blown-out fuse (F202) on the engine board. 




DU-60. 


Improper installation between printer and 
option duplexer s. 


Follow installation 
instruction carefully 
again. 




Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harness 
(S02400). 




Improper connector insertion. 


Remedy. 




Defective option duplexer DU-60. 


Refer to option duplexer 
DU-60's Service 
Manual. 



(4) 1210 - Option duplexer DU-60 side registration error 



IVIeaning 


Suggested causes 


Corrective action 


Side registration 
home position error 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


of option duplexer 
DU-60. 


Improper installation between printer and 
option duplexer, or each option unit. 


Follow installation 
instruction carefully 
again. 




Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harne s s 
(S02400). 




Improper connector insertion. 


Remedy. 




Defective option duplexer DU-60. 


Refer to option duplexer 
DU-60' s Service Manual. 



FS-1900 



6-12 



(5) 2000 - Main motor error 



Meaning 


Suggested causes 


Corrective action 


The main motor is 
overloaded. 


Overcurrent in the main motor circuitry due to 
an excessive torque. 


Follow the flow chart 
below. 




Connector insertion error. 






Defective gate array U204 on the engine board 
(KP-864). 






Defective harness between engine board and 
engine relay board (KP-760). 






Defective harness between engine relay board 
(KP-760) and main motor. 





Call service 
2000:0123456 



Turn power switch off. | 



Remove and check 
harness (S02405) 
between engine board 
(KP-864) and engine 
relaly board (KP-760), 
or harness (S02401) 
between engine board 
(KP864) and main 
motor. 




Replace harness (S02405) 
between engine board 
(KP-864) and engine 
relaly board (KP-760). 



/Replace engine relay board \ 
UKP-760). See page 5-15. J 



NOTE: 

If the problem is not solved by this flow 
chart replace the following items: 

Harness (S02401) between engine 
relay board (KP-760) and engine 
board (KP-864) 

Drive unit (See page 5-27.) 

Engine board (KP-864) and main 
motor (replace at the same time) 




/ Replace engine board 
I (KP-864). See page 5-22. 



(Replace Main motor. 
See page 5-27. 



FS-1900 



6-13 



(6) 2600 - Option bulk paper feeder PF-8E motor error 



Meaning 


Suggested causes 


Corrective action 


Motor error in the 
option bulk paper 
feeder PF-8E. 


Defective harness (S02400) between engine 
boai-d and option unit interface connector. 


Replace engine board 
(KP-864). See page 5- 

22. 




Defective option bulk paper feeder. 


Replace harness 
(S02400). 



(7) 2610 - Option paper feeder PF-60 (Top) paper feed motor error 



Meaning 


Suggested causes 


Corrective action 


Paper feed motor 
error in the top option 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


paper feeder. 


Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harness 
(S02400). 




Defective paper feeder PF-60. 


Refer to option paper 
feeder PF-60' s Service 
Manual. 



(8) 2620 - Option paper feeder PF-60 (Middle) paper feed motor error 



Meaning 


Suggested causes 


Corrective action 


Paper feed motor 
error in the middle 


Defective gate array U204 on the engine 
board (KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


option paper feeder. 


Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harnes s 
(S02400). 




Defective option paper feeder PF-60. 


Refer to option paper 
feeder PF-60' s Service 
Manual. 



(9) 2630 - Option paper feeder PF-60 (Bottom) paper feed motor error 



Meaning 


Suggested causes 


Corrective action 


Paper feed motor error 
in the bottom option 


Defective gate array U204 on the engine board 
(KP-864). 


Replace engine board 
(KP-864). See page 5-22. 


paper feeder. 


Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace harnes s 
(S02400). 




Defective paper feeder PF-60. 


Refer to option paper 
feeder PF-60' s Service 
Manual. 



FS-1900 



6-14 



(10) 4000 - Laser scanner unit (Polygon motor) error 



Meaning 


Suggested causes 


Corrective action 


POLRDY* does not 
go low within 20 
seconds after 
POLON* 
goes low (When 
starting) or within 
16 seconds after 
REGPAP signal goes 
high (during printing). 


Defective gate array U204 on the engine board. 
Defective polygon motor. 


Follow the flow chart 
below. 


Improper connector insertion. 




Defective harness between laser scanner unit 
and engine board. 









Call service 
4000:01234546 



Turn power switch off. 



Remove and check 
harness between 
engine board (KP-864) 
and laser scanner unit. 




NOTE: 

Pins of YC206 connector are 
crowded and tiny. When if 
measuring signal, contact 
measurement probe with pins of 
YC206 connector accurately. 



(Replace harness between 
engine board (KP-864) 
and laser scanner unit. 



2.7165 KHz 



Print status page. 




f Replace engine board \ 
I {KP-864). See page 5-22. ) 



/Replace engine board 
I (KP-864). See page 5-22. 



Replace laser scanner 
unit. See page 5-37. 



NOTE: 

When If not solved this flow chart, 

try to replace below items. 

Harness (S02404) scanner unit 
and engine board (KP-864) 
Engine board (KP-864) and scanner 
unit (replace at the same time) 



FS-1900 



6-15 



(11) 4200 - Laser scanner unit (Pin photo diode sensor) error 



Meaning 


Suggested causes 


Corrective action 


Laser beam detection 
failed. The pin photo 


No laser beam due to the laser diode defect 
(PD*). 


Follow the flow chart 
below. 


diode sensor [board] 


Soiled or defective pin photo diode sensor. 




(KP-746) does not 


Defective gate array U204 of engine board. 




synchronous 


Improper connector insertion. 




signal (PD*). 


Defective harness between engine board and 
laser scanner unit. 





Call service 
4200:0123456 



Turn power switch off. 



Remove and check 
harness between 
engine board (KP-864) 
and laser scanner unit. 



*': Pin photo diode sensor 
[board KP-746] detecting 
horizontal synchronization signal 

Frequency: 2.7 kHz, 
Low level width: 1.4 |is 




f Replace harness between \ 
I engine board (KP-864) | 

y and laser scanner unit. / 



Yes 



/ Replace engine board 
1 (KP-864). See page 5-22. 




/ Replace engine board 
I (KP-864). See page 5-22. 



(Replace laser scanner A 
unit. See page 5-37. J 

NOTE: 

If the problem is not solved by 
this flow chart replace the 
following items: 

Harness (S02404) scanner unit 
and engine board (KP-864) 

Engine board (KP-864) and scanner 
unit (replace at the same time) 



FS-1900 



6-16 



(12) 5300 - Eraser lamp error 



Meaning 


Suggested causes 


Corrective action 


The ERADEAD* 


Blown-out eraser lamp [board KP-762]. 


Follow the flow chart 


signal (delivered from 
the eraser lamp 
blown-out detection 
circuit on the engine 
board) goes low 
continuously more 
than 1 second, while 
eraser lamp is on. 


Defective CPU U201 on the engine board. 


below. 


Improper connector insertion to the eraser lamp 
[board KP-762]. 





Call service 
5300:0123456 



Turn power switch off. 



Remove and check 
harness (S02407) 
between engine board 
(KP-864) and sensor 
board (KP-754). 



Remove and checl< 
harness (S0241 2) 
between drum board 
(KP-748) and eraser 
lamp [board KP762]. 



Checl^ deformation pins 
of connector YC702 on 
sensor board. 






Turn power switch on 
and print starus page. 



Replace sensor board (KP-754) \ 
and linked harness (S02407). j 



/Replace harness (S02412) 
[ between drum board (KP-748) 
yand eraser lamp [board KP762]^ 



/Remedy pins or replace 
( sensor board (KP-754). 
\See page 5-26. . 



Measure voltage #1 pin 
(ERASEDR*) of sensor 
board (KP-754). 




Replace engine board \ 
(KP-864. See page 5-22. i 



(Replace drum unit. 
See page 5-12. 



Replace sensor board ^ 
(KP-754). See page 5-26. 



NOTE: 

If the problem is not solved by 
this flow chart replace the 
following items: 

Engine board (KP864) 
Sensor board (KP754) 
Drum unit 



FS-1900 



6-17 



(13) 6000 - Fuser unit error 



Meaning 


Suggested causes 


Corrective action 


HTEMP* remains 


Blown-out thermistor. 


Follow the flow chart 


high for longer than 


Blown-out heater lamp. 


below. 


4 seconds since 
the heater lamp is on. 
The heater lamp 
continues to be turn 


Defective CPU U201 or comparator U205 on 
the engine board. 




Improper connector insertion. 




on for longer than 


Defective power supply unit. 




60 seconds. 


Defective harness between fuser unit and power 
supply unit. 





Call service 
6000:0123456 



Turn power switch off. 



Remove and check 
harness (S0241 5) 
between fuser board 
(KP-756) and power 
supply unit, or 
thermistor connector 
(YC834) on the 
fuser board (KP-756). 




Turn power switch off, 
and remove power cable. 



CAUTION: 

Fuser unit is fed directly by AC 
power from primary circuit on power 
supply board. 

Be careful with electricshocl^. 
Fuser unit is extremely hot 
immediately after the printer was 
running. Allow substantial period of 
time until it cools down. 



/Replace harness (S02415) 
j between fuser board (KP-756) 
\ and power supply unit. 



f Replace fuser unit. See 
I page 5-29. 



Detach connector CN2 
® on power supply 
board. See figure right. 




Measure resistance 
between pins 1 and 3 
of the detached 
connector. 




Replace fuser unit. See 
page 5-29. 



Replace power supply 
unit. See page 5-22. 




'Replace engine board 
(KP-864). See page 5-22. 



c 



End. 



FS-1900 



6-18 



(14) 6020 - Abnormal high temperature error 



Meaning 


Suggested causes 


Corrective action 


CPU U201 detected 
that the HTEMP* 


Defective CPU U201 or comparator U205 on 
the engine board. 


Follow the flow chart 
below. 


signal (Abnormal 


Defective engine board (KP-864). 




temperature of more 
than approximately 
220 °C) is low for 
more than 3 seconds. 


Defective thermistor. 




Defective photo coupler on the power supply 
unit for the heater lamp. 





Call service 
6020:0123456 



Turn power switch off. 



Remove and check 
harness (S0241 5) 
between fuser board 
{KP-756) and power 
supply unit. 




Turn power switch on. 



Measure voltage at pin 
#6(THERM)ofYC831 
on fuser board (KP-756). 



CAUTION: 

Fuser unit is fed directly by AC 
power from primary circuit on power 
supply board. 
Be careful with electricshock. 



/^Replace harness (S02415) 
j between fuser board (KP- 
Y 756) and power supply unit. 




Replace engine board \ 
(KP-864). See page 5-22. ) 



/ Replace fuser unit. See 
I page 5-29. 



NOTE: 

If the problem is not solved by 
this flow chart replace, the 
following items: 

Engine board (KP-864) 
Power supply unit 
Fuser unit 



FS-1900 



6-19 



(15) 6400 - Zero cross signal error 



Meaning 


Suggested causes 


Corrective action 


The ZCROSS signal 
does not reach the 


Defective power supply unit. 


Replace power supply 
unit. See page 5-22. 


engine board within 
3 seconds after power 
on. 


Defective CPU U201 on the engine board. 


Replace engine board. 
See page 5-22. 



(16) 7001 -Toner motor error 



IVIeaning 


Suggested causes 


Corrective action 


Toner motor is 


Overcurrent in the toner motor circuitry due to 


Follow the flow chart 


overloaded. 


an excessive torque, caused by hardened toner. 


below. 


TNMOC is detected 
by samphng every 
other 1 no ms in 2 


Defective gate array U204 on the engine board. 




Improper connector insertion. 




seconds since the 
main and toner 


Defective harness between developer and high 
voltage unit. 




motors are activated 


Defective harness between high voltage unit 




following the Replace 


and engine board. 




toner Clean printer 
message after the 
Toner low TK-60 is 






detected. 







Call service 
7001:0123456 



Replace with a new 


toner kit. See page 3-4. 


\^ho\ 


9^ Yes 


m?^ 


^\ 


No 


( - 


- ) 



'Replace engine board n. 
(KP-864) and developer. U 
See page 5-22 and 3-13/ ' 



NOTE: 

If the problem is not solved by 
this flow chart, replace the 
following items: 

High voltage unit 

Harness (S02416) [Between developer and high voltage unit] 

Harness (S02416) [Between engine board and high voltage unit] 



FS-1900 



6-20 



(17) 7350 -Toner refreshing mode error 



Meaning 


Suggested causes 


Corrective action 


Toner refreshing 


Defective high voltage unit. 


Replace high voltage unit. 


mode error. 




See page 5-25. 

Refer to section Toner 

refreshing mode on page 

3-22. 



(18) 8010 - Option bulk paper stacl^er HS-8E motor error 



IVIeaning 


Suggested causes 


Corrective action 


Motor error in the 
option bulk paper 


Defective harness (S02400) between engine 
board and option unit interface connector. 


Replace engine board 
(KP-864). See page 5-22. 


stacker HS-8E. 


Defective option bulk paper stacker HS-8E. 


Replace harnes s 
(S02400). 



(19) FO - Main board or LCD controller board error 



IVIeaning 


Suggested causes 


Corrective action 


Communication is 


Defective system DIMM [board KP-893]. 


Replace system DIMM 


failed between the 
LCD controller board 


Defective main board (KP-948). 


[board KP-893] or main 
board (KP-948). 


(KP-738) and the 
main board. 


LCD controller board (KP-738). 


Replace LCD controller 
board (KP-738). 



(20) F010 - System DIMM [board] error 



Meaning 


Suggested causes 


Corrective action 


Checksum failed with 
system DIMM [board 
KP-893] on the main 


Defective system DIMM [board KP-893]. 


Replace system DIMM 
[board KP-893] or main 
board (KP-948). 


board. 


Improper system DIMM [board KP-893] 
insertion to system DIMM slot on the main 
board (KP-948). 


Reinsert the system 
DIMM [board KP-893]. 



6-21 



FS-1900 



(21) F020 - Main or expanded memory error 



Meaning 


Suggested causes 


Corrective action 


Checksum failed with 
main memory (RAM) 


Defective system main memory (RAM) on the 
main board (KP-948). 


Replace main board (KP- 
948). 


on the main board or 


Defective main board (KP-948). 




expanded memory 
(DIMM). 


Defective expanding memory (DIMM) on the 
main board (KP-948). 


Replace expanding 
memory (DIMM). 



(22) F030 - General failure 



IVIeaning 


Suggested causes 


Corrective action 


Miscellaneous failure 


Defective main board (KP-948). 


Replace main board (KP- 


with the main board, 




948). 


other than FO,FO 10 






and F020, above. 







(23) F040 - Communication error 



IVIeaning 


Suggested causes 


Corrective action 


Communication 
between the engine 


Defective gate array (U02) on the main board. 


Replace the main board 
(KP-948). See page 5-24. 


board and the main 
board is failed. 


Connector failure between the engine board 
(KP-864) and main board (KP-948). 


Verify connector 
connections. 




Overrun in the engine system, deactivating the 
program flash ROM (U202) on the engine 
board (KP-864). 


Replace the engine board 
(KP-864). See page 5-22. 



(24) F070 - Flash ROM error 



Meaning 


Suggested causes 


Corrective action 


CPU U201 of engine 


Defective CPU U201 or gate array U204 or 


Replace engine board 


board could not write 


flash ROM U202 on the engine board (KP- 


(KP-864). 


data failed to flash 


864). 




ROM U202. Write 






sequence to flash 






ROM is not 






successful. 






Verify error. (Written 






data does not match 






the original data.) 







FS-1900 



6-22 



6-1-3 Other problems 

(1) False "Close paper transfer unit" 



False 

"Close paper 
transfer unit" 



Measure voltage #12 
pin of YC701 on sensor 
board (KP-754). 




Connect circuit tester to 
pin#20ofYC203on 
engine board (KP-864). 



Yes 



Replace sensor board 
{KP-754). See page 5-26. 




' Replace engine board \ 
(KP-864). See page 5-22J 



(2) False "Close top cover" 



False "Close 
top cover" 



Measure logic level #11 
pin of YC701 on sensor 
board (KP-754). 




' Replace engine board \ 
(KP-864). See page 5-22. J j 



Replace sensor board \ 
(KP-754). See page 5-26.) 



FS-1900 



6-23 



(3) False "Close left cover' 



False "Close 
left cover" 



Measure voltage #6, #7 
and#8pinsofYC203on 
engine board (KP-864). 




/Replace sensor board \ 
WKP-754). See page 5-26. J i 



Replace engine board \ 
(KP-864). See page 5-22. 1 



(4) Defective waste toner box detecting 



Problem 


Suggested causes 


Corrective action 


Although new waste 
toner box is 


Defective waste toner full sensor [board] (KP- 
766) or waste toner sensor (receiver). 


Replace drum unit. See 
page 5-12. 


installed, Check 
waste toner 

box is displayed. 
Although waste toner 


Deformed pins of connector (YC702) on the 
sensor board (KP-574). 


Check and straighten pins 
of connector (YC702) on 
the sensor board (KP- 
574). 


bottle is not installed, 
Ready is displayed. 


Defective engine board (KP-864). 


Replace engine board 
(KP-864). 



FS-1900 



6-24 



(5) Defective paper jam detecting 



Problem 


Suggested causes 


Corrective action 


Paper jam frequently 
occurs. 


Surface of the registration sensor (PH701) is 
dirty with paper particles. 


Clean with cloth. 


False paper jam 
message display. 


Actuators of registration sensor (PH701) or 
exit sensor does not operate smoothly. 


Repair or replace. 




Defective sensor board (KP-574), fuser board 
(KP-756) or engine board (KP-864). 


Replace sensor board 
(KP-754), fuser board 
(KP-756), or engine board 
(KP-864). See page 5-26 
and 5-22. 




A piece of paper torn from a sheet is caught 
around actuator of registration sensor or exit 
sensor. 


Check visually and 
remove it, if any. 



(6) Defective paper gauge sensing 



Problem 


Suggested causes 


Corrective action 


False paper gauge 
indication. 


Surface of the paper gauge sensor 1 (PH702) 
and 2 (PH703) on the sensor board (KP-754) 
are dirty with paper particles. 


Clean with cloth. 




A piece of paper torn from a sheet is caught 
around paper gauge sensor 1 (PH702) and 2 
(PH703) on the paper sensor board (KP-754). 


Check visually and 
remove it, if any. 




Reflecting miiTor has come off the actuator of 
paper gauge sensor 1 (PH702) and 2 (PH703). 


Check visually and 
remove it, if any. 




Defective paper gauge sensor 1 (PH702) and 2 
(PH703) on the sensor board (KP-754). 


Replace sensor board 
(KP-574). See page 5-26. 




Defective engine board (KP-864). 


Replace engine board 
(KP-864). See page 5-22. 



(7) Defective paper size detecting 



Problem 


Suggested causes 


Corrective action 


False paper size 


Defective paper size switch. 


Replace paper size switch. 


message display. 


Defective sensor board (KP-754). 


Replace sensor board 
(KP-574). See page 5-26. 




Defective engine board (KP-864). 


Replace engine board 
(KP-864). See page 5-22. 



6-25 



FS-1900 



(8) Defective message displaying (LCD) 



Problem 


Suggested causes 


Corrective action 


No message appears 
on the message 


Defective main board (system DIMM board 
[KP-893]). 


Replace main board 
(system DIMM [board]). 


display (LCD), 
though the message 


Defective LCD controller board (KP-738). 


Replace LCD controller 
board (KP-738). 


background is 
faintly illuminated.. 
(Power is supplied 
to the LCD controller 
board [KP-738] .) 


Defective engine board (KP-864). 


Replace engine board 
(KP-864). 


Improper connection of harness (S02402) 
between LCD controller board (KP-738) and 
engine relay board (KP-760). 


Reinsert the connector. 




Improper connection of harness (S02405) 
between engine board (KP-864) and engine 
relay board (KP-760). 


Reinsert the connector. 


No message appears 
on the message 


Defective main board (system DIMM [board 
KP-893]). 


Replace main board 
(system DIMM [board]). 


display (LCD), even 
thought the message 


Defective LCD controller board (KP-738). 


Replace LCD controller 
board (KP-738). 


background does not 
illuminate faintly. 
(The power is not 
supplied to the LCD 
controller board 
[KP-738].) 


Defective engine board (KP-864). 


Replace engine board 
(KP-864). 


Improper connection of harness (S02402) 
between LCD controller board (KP-738) and 
engine relay board (KP-760). 


Reinsert the connector. 


Improper connection of harness (S02405) 
between engine board (KP-864) and engine 
relay board (KP-760). 


Reinsert the connector. 




Broken power cord. 


Replace the power cord. 




The power cord is not plugged in properly. 


Check the contact 
between the printer's AC 
inlet and the outlet. 




No electricity at the power outlet. 


Measure the AC power 
voltage at the outlet. 




Defective power supply unit. 


Replace the power supply 
unit. See page 5-22. 



NOTE: If the corrective action above does not solve the problem, there might be a short circuit in 
the respective circuit. Check the conductivity of the each terminals ( ground, 5 V and 24 V power 
line) of the circuit board. If a short circuit is detected, replace the circuit board. 



FS-1900 



6-26 



(9) Defective face up/down solenoid operating 



Problem 


Suggested causes 


Corrective action 


Change guide does 
not operate in the 


Improper insertion of the face up/down solenoid 
connector into fuser board (KP-756). 


Reinsert the connector. 


fuser unit. 


Broken face up/down solenoid coil or blown- 
out fuse (ICP831) on the fuser board (KP-756). 


Remove and then check 
for continuity across the 
face up/down solenoid 
connector terminals; pin 
#1 and pin #2, pin #3 and 
pin #2. Remove and check 
for continuity of fuser 
board(KP- 7 5 6) 
connectors terminals; 
across the pin #2 of 
connector (YC832) and 
pin #2 of connector 
(YC831). If none, replace 
the face up/down solenoid 
and fuser board (KP-756) 
at the same time. Or 
replace fuser unit. 
See page 5-29. 




Defective engine board (KP-864) or power 
supply unit. 


Replace engine board 
(KP-864) or power supply 
unit. See page 5-22. 



6-27 



FS-1900 



6-1-4 Circuit board terminal voltages 
(1) Engine board 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC201 


Al 


GND 


- 


- 


Signal ground 




Bl 


GND 


- 


- 


Signal ground 




A2 


+5 VI 


I 


5VDC 


Power supply for main board 




B2 


+5 VI 


I 


5VDC 


Power supply for main board 




A3 


+5 VI 


I 


5VDC 


Power supply for main board 




B3 


SIOUT 





3.3 V/0 V DC 


Serial data output signal 




A4 


SDIR 





3.3 V/0 V DC 


Serial line direction signal 




B4 


SCLKN 





3.3 V/0 V DC (Pulse) 


Serial clock signal 




A5 


EGIR 





3.3 V/0 V DC 


Engine interrupt request signal 
Interrupt/Not Interrupt 




B5 


SBSY* 





V/3.3 V DC 


Serial line busy signal, Busy/Not busy 




A6 


VDFONl 





V/3.3 V DC 


Forced video data output signal, On/Off 




B6 


SOIN 


I 


3.3 V/0 V DC 


Serial data input signal 




A7 


VSREQ* 





V/3.3 V DC 


Vertical synchronized request signal Request/Not request 




B7 


SYSRES* 





V/3.3 V DC 


System reset signal, Reset/Not reset 




A8 


GND 


- 


- 


Signal ground 




B8 


PDOUT* 





V/3.3 V DC (Pulse) 


Pin photo diode sensor [board], Laser beam detecting signal 




A9 


GND 


- 


- 


Signal ground 




B9 


GND 


- 


- 


Signal ground 




AlO 


GND 


- 


- 


Signal ground 




BIO 


VDO+ 


I 


1.02 to 1.38 V DC 


LVDS video data signal (positive) 




All 


GND 


- 


- 


Signal ground 




Bll 


VDO- 


I 


1.38 to 1.02 V DC 


LVDS video data signal (negative) 




A12 


FPDIR 





3.3 V/0 V DC 


Communication direction signal withLCD controller board 




B12 


GND 


- 


- 


Signal ground 




A13 


+3.3V1 





3.3 V DC 


Power supply for LCD controller board 




B13 


FPCLK 





3.3 V/0 V DC (Pulse) 


Communication data clock signal with LCD controller board 




A14 


GND 


- 


- 


Signal ground 




B14 


FPDATA 


I/O 


3.3 V/0 V DC (Pulse) 


Communication data signal with LCD controller board 



FS-1900 



6-28 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC201 


A15 


20PSEL5 





5 V/0 V DC 


Option unit identifying signal 5 




B15 


GND 


- 


- 


Signal ground 




A16 


20PSEL3 





5 V/0 V DC 


Option unit identifying signal 3 




B16 


20PSEL4 





5 V/0 V DC 


Option unit identifying signal 4 




A17 


GND 


- 


- 


Signal ground 




B17 


20PTRIG* 





V/5 V DC 


Reserved 




A18 


20PSDO 





5 V/0 V DC (Pulse) 


Serial communication output signal 




B18 


20PRDY* 


I 


V/5 V DC 


Option unit ready signal, Ready, Not ready 




A19 


20PSCLK 





V/5 V DC (Pulse) 


Serial communication clock signal with option unit 




B19 


20PSDI 


I 


5 V/0 V DC (Pulse) 


Serial communication input signal 




A20 


OP24V 





24 V DC 


Power supply for option unit 




B20 


0P5V 





5VDC 


Power supply for option unit 


YC202 


1 


+24V2 


I 


24 V DC 


Power supply 




2 


FDPFUL* 


I 


V/5 V DC 


Paper full sensor, Paper full/Not full 




3 


FUDR 





V/24 V DC 


Face up/down solenoid. Change to face down, On/Off 




4 


FDDR 





V/24 V DC 


Face up/down solenoid. Change to face up, On/Off 




5 


THERM 


I 


Analog 


Thermistor detecting heat roller temperature signal 




6 


EXITPAP* 


I 


V/5 V DC 


Exit sensor, Paper Detected/Not detected 




7 


+5 VI 


I 


5VDC 


Power supply 




8 


GND 


- 


- 


Signal ground 




9 


+24V2 


I 


24 V DC 


Power supply 




10 


SLEEP* 





V/5 V DC 


Energy saving mode, On/Off 




11 


ZCROSS 


I 


5 V/0 V DC (pulse) 


Zero cross signal 




12 


HEATON* 





V/5 V DC 


Heater lamp, On/Off 



6-29 



FS-1900 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC202 


13 


+5 VI 




5 VDC 


Power supply 




14 


+5 VI 




5 VDC 


Power supply 




15 


+5 VI 




5 VDC 


Power supply 




16 


+5 VI 




5 VDC 


Power supply 




17 


GND 


- 


- 


Signal ground 




18 


GND 


- 


- 


Signal ground 




19 


GND 


- 


- 


Power ground 




20 


GND 


- 


- 


Power ground 




21 


+24V1 


I 


24 VDC 


Power supply 




22 


+24V1 


I 


24 VDC 


Power supply 




23 


+24V1 


I 


24 VDC 


Power supply 




24 


+24V1 


I 


24 VDC 


Power supply 


YC203 


1 


+24V1 





24 VDC 


Power supply to sensor board 




2 


+24V1 





24 VDC 


Power supply to sensor board 




3 


+24V1 





24 VDC 


Power supply to sensor board 




4 


GND 


- 


- 


Not used 




5 


GND 


- 


- 


Not used 




6 


+24V2 


I 


24 VDC 


Power supply 




7 


+24V2 


I 


24 VDC 


Power supply 




8 


+24V2 


I 


24 VDC 


Power supply 




9 


ERASEDR 





V/14.7 V DC 


Eraser lamp [board], Turn On/Off 




10 


WTNLED* 





V/4.3 V DC 


Waste toner full sensor [board] 
(light emitting), Turn On/Off 




11 


TNRFUL* 





OV/4.1 VDC 


Waste toner full sensor (light receiving). 

Toner full Detected/Not detected 

(Signal validates during WTNLED* signal output.) 




12 


- 




- 


Reserved 




13 


+5V2 





5 V/OV DC 


Power supply to sensor board. 
Printer status Ready /Sleep 




14 


GND 


- 


- 


Signal ground 




15 


EEDIO 


I/O 


5 V/OV DC (pulse) 


EEPROM (Drum board) data signal 




16 


EECLK 





5 V/OV DC (pulse) 


EEPROM (Drum board) clock signal 




17 


REGPAP* 


I 


V/5 V DC 


Registration sensor. 

Paper Detected/Not detected 




18 


PVOLANl 


I 


V/5 V DC 


Paper gauge sensor 1, On/Off 




19 


TCOVOP 


I 


V/5 V DC 


Top cover switch, On/Off 



FS-1900 



6-30 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC203 


20 
21 

22 


FCOVOP* 
CSIZE 

PV0LAN2 


I 
I 
I 


24 V/0 V DC 

Analog 

V/5 V DC 


Top cover/paper transfer unit interlock switch, On/Off 
Paper size switch detecting signal 
Paper gauge sensor 2, On/Off 


YC204 


1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 


TRVSEL2* 

TRVSELl* 

+5 VI 

TRVSEL3* 

TNEMP* 

TRCON* 

TONSCAN 

HVCLK 

GND 

MCHON* 

HUNIT* 

RTRCHON* 

HANDS* 

DLPTYPE 

+5V2 

TMOTDR 

CONTYPE 

+24V2 







I 







I 



I 
I 




I 




V/24 V DC 
V/24 V DC 
5VDC 

V/24 V DC 
V/5 V DC 
V/24 V DC 
5 V/0 V DC (Pulse) 
5 V/0 V DC (Pulse) 

V/24 V DC 

5 V/0 V DC 

V/24 V DC 

V/5 V DC 

Analog 

5VDC 

24 V/0 V DC 

5VDC 

(0 V/5 V DC) 

24 V DC 


Transfer bias output voltage control signal 2 

Transfer bias output voltage control signal 1 

Power supply for high voltage board 

Transfer bias output voltage control signal 3 

Toner sensor, Toner empty /Not empty 

Transfer bias. Output On/Off 

Toner sensor. Toner detecting clock signal 

Developing bias output clock signal 

Power ground 

Main charger. Output On/Off 

Option feeder, Installed/Not installed 

Transfer bias output. Reverse On/Off 

MP tray paper sensor,Paper Detected/Not detected 

Developer identifying signal 

Power supply for high voltage board 

Toner motor, Drive/Stop 

Toner container identifying signal 

(MICR model only) 

Power supply for high voltage board 


YC205 


1 

2 
3 
4 
5 


OP24V 

GND 

0P5V 

OPSCLK 






24 V DC 
5VDC 

5 V/0 V DC (Pulse) 


Power supply for option unit 

Signal ground 

Power supply for option unit 

Reserved 

Serial communication clock signal 



6-31 



FS-1900 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC205 


6 

7 

8 

9 

10 

11 

12 


OPSELO 

OPSDI 

OPSELl 

OPSDO 

0PSEL2 

OPRDY* 

GND 




I 





I 


V/5 V DC 
5 V/0 V DC 
V/5 V DC 
5 V/0 V DC 
V/5 V DC 
V/5 V DC 


Option unit identify signal 

Serial communication data signal with option unit 

Option unit identifying signal 1 

Serial communication data signal with option unit 

Option unit identifying signal 2 

Option unit. Ready /Not ready 

Signal ground 


YC206 


1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

21 

22 


+24V2 

+3.3V1 

MPFSOL* 

FPDATA 

MIDDR* 

FPDIR 

+24V2 

FPCLK 

GND 

GND 

FEDDR* 

FPRST* 

+24V2 

FANDR 

REGDR* 

MMOTON* 

GND 

MMOTRDY* 

+5V3 

SAMPLEl* 

POWCONT 
LASER* 








I/O 



I 



I 
















24 V DC 
3.3 V DC 

V/24 V DC 
3.3 V/0 V DC 
V/24 V DC 
3.3 V/0 V DC 
24 V DC 
3.3 V/0 V DC (Pulse) 

V/24 V DC 
3.3 V/0 V DC 
24 V DC 

24V/15tol6V/0VDC 
V/24 V DC 
V/5 V DC 

V/5 V DC 
5 VDC 

V/5 V DC (Pulse) 

V/5 V DC 
V/5 V DC 


Power supply for engine relay board 

Power supply for LCD controller board 

MP tray feed solenoid, On/Off 

LCD controller board data signal 

Middle feed clutch, On/Off 

LCD controller board 

Power supply for engine relay board 

Communication data clock signal 

Power/Signal ground 

Power/Signal ground 

Feed clutch, On/Off 

LCD controller board reset signal 

Power supply for engine relay board 

Cooling fan motor, Speed control High/Low/Stop 

Registration clutch, On/Off 

Main motor, Drive/Stop 

Power/Signal ground 

Main motor, Ready/Not ready 

Power supply for laser scanner unit 

Laser power data sample and hold control signal 

Data Sampling/Not sampling 

Laser power level control signal,High/Low 

Laser power output signal, Enable/Disable 



FS-1900 



6-32 



Connector 


Pin# 


Signal 


I/O 


Voltage 


Function 


YC206 


23 


VDO+ 





1.02 to 1.38 V DC 


LVDS video data signal (positive) 




24 


VDO- 





1.38 to 1.02 V DC 


LVDS video data signal (negative) 




25 


GND 


- 


- 


Power/Signal ground 




26 


+5V3 





5VDC 


Power supply for laser scanner unit 
step-downed from 24 V DC (+24V2) 




27 


PDIN* 


I 


V/5 V DC 


Pin photo diode sensor detecting signal 




28 


GND 




- 


Power/Signal ground 




29 


POLCLK 





V/5 V DC (Pulse) 


Polygon motor rotation speed control clock signal 




30 


POLRDY* 


I 


V/5 V DC 


Polygon motor start-up ready signal, 
Ready /Not ready 




31 


POLON* 





V/5 V DC 


Polygon motor drive signal, Drive/Stop 




32 


GND 


- 


- 


Power/Signal ground 




33 


+24V2 





24 V DC 


Power supply for laser scanner unit 




34 


GND 




- 


Power/Signal ground 


YC209 


1 


AIRTEMP 


I 


Analog 


Temperature/humidity sensor detecting 
external temperature signal 




2 


+5 VI 





5VDC 


Power supply for engine relay board 




3 


WETCKl 





V/5 V DC (Pulse) 


Temperature/humidity sensor driveclock signal 1 




4 


WETCK2 





V/5 V DC (Pulse) 


Temperature/humidity sensor drive clock signal 2 



6-33 



FS-1900 



6-1-5 Assignment of circuit board connector pins 

When measuring voltage or signal of circuit board installed in the printer, refer to the pin assignment 
figure below. For further information of each pins and other circuit board, refer to section Appendix 
A Wiring diagram on page A- 20. 



Engine board 



/^ 



~A 



Z/ A 1- 




33 


{) 


X Ml 1 I4|/ 2___ 




34 


/ / 


f 1/ 


YC209 


YC206 




Engine board 



High voltage unit 



[Parts side] Ml I I I I I I |9|\ 




Engine board 



Fuser board 




Power supply unit 



FS-1900 



Figure 6-1-1 Assignment of circuit board connector pins 



6-34 



6-1-6 Print quality problems 

Print quality problems range from uneven tone to completely blank output. The troubleshooting 
procedure for each type of problem is given below. 



(1) Completely (2) All-black 
blank printout printout 

See page 6-38. See page 6-39. 



(5) Black horizontal 
streaks 

Seepage 6-41. 




(9) Dirt on the top 
edge or back of 
the paper 

See page 6-45. 





(6) Black vertical 
streaks 

See page 6-42. 




(10) Undulated printing 
at the left edge (scanning 
start position) 

See page 6-46. 



"This vertical 
line should 
be straight. 



(3) Dropouts 

See page 6-40. 




(7) Unsharpness 

See page 6-43. 




(4) Black dots 

Seepage 6-41. 




(8) Gray 
background 

See page 6-44. 




6-35 



FS-1900 



(1) Completely blank printout 



Check the developer. 

• Check that the developer is inserted correctly. See page 5-4. 

• Check that the toner on the magnet roller surface. See page 5-4. 

Check the transfer bias potential. 

• Check the transfer bias output on the high voltage unit. This requires removal of the left cover and 
the test equipment. Replace the high voltage unit if high voltage potential is not available on the 
board. See page 5-25. 

Check the laser scanner unit. 

• The scanner components within the scanner may be disordered. Replace the laser scanner unit. 
See page 5-37. 

Replace the main board. 

• Defective laser scanner unit control circuit in the main board (KP-948). See page 5-24. 



FS-1900 



6-36 



(2) All-black printout 




Check the main charger unit 

• Open the printer side cover and check that the drum unit is correctly seated. Check for poor 
contact of the main charger terminal between the main charger unit and the drum unit. 

Check the drum bias. 

• Make sure the bias from the high voltage unit correctly arrives at the drum unit. 

Check high voltage potential at the high voltage unit. 

• Check the high voltage output on the high voltage unit. Replace the high voltage unit if high 
voltage potential is not available on the board. 

Replace the main board. 

• Defective laser scanner unit control circuit in the main board (KP-948). See page 5-24. 



FS-1900 
6-37 



(3) Dropouts 




Note the spacing of the defects. Refer to Repetitive defects gauge. See page 6-47. 

• If the defects occur at regular intervals of 39 mm, the problem may be the damaged developing 
roller (in the developer). Replace the developer. See page 3-13. 

• If the defects occur at regular intervals of 94 mm, the problem may be the damaged drum (in the 
drum unit). Replace the drum unit. See page 5-12. 

• If the defects occur at regular intervals of 72 mm (heat roller) or 79 mm (press roller), the problem 
may be the damaged fuser unit. Replace the press roller or heat roller. See page 5-34 or 5-36. 

Check paper property. 

• Paper with rugged surface or dump tends to cause dropouts. Replace paper with the one that 
satisfies the paper specifications. 

Check the transfer roller installation. 

• The transfer roller must be supported by the bushes at the both ends. Clean the bush to remove oil 
and debris. Replace the transfer roller if necessary. See page 5-17. 

Check the transfer bias potential. 

• Check the transfer bias output on the high voltage unit. This requires removal of the left cover and 
the test equipment. Replace the high voltage unit if high voltage potential is not available on the 
board. See page 5-25. 



FS-1900 



6-38 



(4) Black dots 




Note the spacing of the defects. Use the Repetitive defects gauge. See page 6-47. 

• If the defects occur at regular intervals of 94 mm, the problem may be the damaged drum (in the 
drum unit). Replace the drum unit. See page 5-12. 

• If the defects occur at random intervals, the toner may be leaking from the developer and drum 
unit. Replace the developer and drum unit. See page 5-4 and 5-12. 

(5) Black horizontal streaks 




Check the drum unit's ground. 

• The drum axle in the drum unit and its counter part, the grounding tab in the printer, must be in a 
good contact. If necessary, apply a small amount of electro-conductive grease onto the tab. 

The drum may be defective. 

• Replace the drum unit. See page 5-12. 



FS-1900 



6-39 



(6) Black vertical streaks 




Contaminated main charger wire. 

• Clean the main charger wire by pulling the green colored cleaning knob in and out several times. 
See page 3-9. 

Check the drum surface for a streak of toner laying lengthwise. 

• A streak of toner remaining on drum after printing means that the cleaning blade (in the drum unit 
) is not working properly. Replace the drum unit. See page 5-12. 

Defective magnet roller (in the developer). 

• Replace the developer. See page 5-4. 



FS-1900 



6-40 



(7) Unsharpness 




Check paper for property. 

• Paper with rugged surface or dump tends to cause unsharp printing. Replace paper with the one 
that satisfies the paper specifications. 

Check the transfer roller installation. 

• The transfer roller must be supported by the bushes at the both ends. Clean the bush to remove oil 
and debris. Replace the transfer roller if necessary. See page 5-17. 

Check the transfer bias potential. 

• Check the transfer bias output on the high voltage unit. This requires removal of the left cover and 
the test equipment. Replace the high voltage unit if high voltage potential is not available on the 
board. See page 5-25. 

Check EcoPrint setting. 

• The EcoPrint mode can provides faint, unsharp printing because it acts to conserve toner for draft 
printing purpose. For normal printing, turn the EcoPrint mode off by using the operator panel. For 
details refer to the printer's User's Manual. 



FS-1900 



6-41 



(8) Gray background 




Check the print density setting. 

• The print density may be set too high. Try adjusting the print density using the Remote operation 
panel utility. For details refer to the printer's User's Manual. 

Check the surface potential of the drum (in the drum unit). 

• The drum potential should be approximately 230±15 V. This may vary depending on production 
lots. Measurement is possible only by using the jig and tool specifically designed for this purpose. 
The drum unit will have to be replaced if it bears values far out of the allowable range. 

Check the grid. 

• Clean the grid by grid cleaner. See page 3-9. 

The developing roller (in the developer) may be defective. 

• If a developer which is known to work normally is available for check, replace the current developer 
in the printer with the normal one. If the symptom disappears, replace the developer with a new 
one. See page 5-4. 



FS-1900 



6-42 



(9) Dirt on the top edge or back of the paper 




Check toner contamination in various parts. 

• Dirty edges and back of the paper can be caused by toner accumulated on such parts as the paper 
chute, paper transportation paths, the bottom of the drum and developer, and the fuser unit inlet. 
Clean these areas and parts to remove toner. 

Check the transfer roller. 

• If the transfer roller is contaminated with toner, clean the transfer roller using a vacuum cleaner; 
or by continuously printing a low-density page until the symptom has faded away. 



FS-1900 



6-43 



(10) Undulated printing at the left edge (scanning start position) 



"This vertical 
line should 
be straight. 



Replace the laser scanner unit. 

• Defective polygon motor in the laser scanner unit. Replace the laser scanner unit. See page 5-37. 

Replace the engine board. 

• Defective engine controller circuit in the engine board (KP-864). See page 5-22. 



FS-1900 



6-44 



Repetitive defects gauge 

Use the following measurements for checking repetitive occurrences on the printed page. This will 
help locating the roller, etc., which has the cause for these defects. See the above section for details. 



First occurrence of defect 



[39 mm] Developing roller (Developer) 

[50 mm] Upper and Lower registration roller 

[62 mm] Transfer roller 

[72 mm] Heat and press roller (Fuser unit) 



[94 mm] Drum (Drum unit) 



Figure 6-1-2 Repetitive defects gauge 



FS-1900 
6-45 



6-1-7 Correcting a paper jam 

If a paper jam occurs while you are printing, remove the jammed paper as described below. After 
you have removed the jammed paper, open and close the top cover or the paper transfer unit. 

While the paper jam message is displayed, press the Q key. A on-line help message appears. 

(1) Jam in the rear cover 

1 . While pulling the paper transfer unit release lever (T), pull out the paper transfer unit (g). 




Figure 6-1-3 Drawing the paper transfer unit 



2. Open the rear cover (5) and remove the jammed paper as shown in the figure. 



FS-1900 




Figure 6-1-4 Jam in the rear cover 



6-46 



(2) Jam inside the printer 

1 . While pulling the paper transfer unit release lever, pull out the paper transfer unit (See previous 
page). 

2. If paper is jammed before the registration roller, remove it as shown figure 6-1-5. If paper 
jammed under the registration roller, remove it as shown in figure 6-1-6. 




Figure 6-1-5 Jam in the printer (1) 




Figure 6-1-6 Jam in the printer (2) 



6-47 



FS-1900 



Appendix A Diagram 



Appendix A Contents 



Timing charts A-3 

Cassette feeding, two A4 size papers, face-down tray output A-3 

Cassette feeding, two ietter size papers, face-down tray output A-4 

Cassette feeding, two legal size papers, face-down tray output A-5 

Option paper feeder cassette feeding, two A4 size papers, face-down tray output A-6 

MP tray feeding, two A4 size papers, face-down tray output A-7 

MP tray feeding, two letter size papers, face-down tray output A-8 

MP tray feeding, two legal size papers, face-down tray output A-9 

Wiring diagram A-10 



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A-6 



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A-7 



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FS-1900 



A-8 



MP tray feeding, two legal size papers, face-down tray output 



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FS-1900 



A-9 



Wiring diagram 




FS-1900 



A-10 



Appendix B Status Page 



Appendix B Contents 



status page B-3 

Printing tine service status page B-3 

Service information on the status page B-4 

Detaiis of service information B-4 



status page 



The printer can print two different types of the status page — the user (normal) status page and the 
service status page. This section exclusively describes information obtainable with the service status 
page. For information on the user (normal) status page, refer to the printer's User's Manual. 

Information on the service page include various settings for the printer, service statistics, etc. To 
print a service status page, proceed as follows: 

Printing the service status page 

To print a service status page, using the MENU key. Or, have a PC running MS-DOS and proceed 
as follows: 

1. Connect the printer to the PC via the parallel interface. 

2. Ensure that the printer is ready to print. 

3. At the DOS prompt, type: 

echo !R! STAT 1; EXIT; >lptl: 

The service status page is printed. (If you omit '1,' a user status page is printed.) 



FS-1900 
B-3 



Service information on the status page 

An example of the service status page is shown below. (Note the details bom by the status page my 

differ from a firmware version to another.) Most of the service information are located under Service 

information. 

Most of these service information on the status page are alphanumerically-coded. Each item is 

explained on the next page. 

Details of service information 



Controller firmware version* 



Released date of the firmware 



PAGE PRINTER STATUS PAGE 



Firmware version : 84 .00-01 




Service information 



[OAOO/0003] [CI] [32.00 ] [17/05] Total page 9690 

/t/POO/SOO/FOO/mO/D10:DM0301.DAN/ 

/0020/0020/1061/0811/ 0/ 0/ 0/ 0/ 0/ 0/ 

/AAAAAA/AAAAAA/AMAAA/AAAAAA/ 

AAAAAA/AAAAAA/ 

AAAAAA/ 

/003D/0005/0005/0005/0005/0005/0005/0005/0000/ 

RS2/FF/ [0003-00031 /AI.E/1/20/31/50 

/80S8808S80808000/808880S8S080S000/S088S08S80808000/808880S8S0S0S000/ 
/20A11080/1020B200/20001080/81000000/00000000/10101010/10101010/ 
SPDl:0203040508090A0B0C0D0F10111213141516ni8191AlBlClDlElF202122235E 
DH:SPL9200007 SN:SPL9200010 



i 



Service information 



FS-1900 



B-4 



Service information 



0/ 0/ 0/ 



[ OAOO/0003] [CI] [32.00 ] [17/05] Total page 

© (D (3) ® 
/t/POO/SOO /FOO/NOO/DlO :DM0301 . DAN / 
®(7)® (9) (§) @ 
/0020/0020/1061/0811/ 0/ 0/ 0/ 

/AAAAAA/AAAAAA/AAAAAA/AAAAAA/ 

@ 
AAAAAA/AAAAAA / 

AAAAAA / 

@ 
/003D/ 0005/ 0005/ 0005/ 0005/ 0005/ 0005/ 0005/ 0000/ 



9690 



RS2/FF/ [ 0003-0003 ] /AI.E /1/20/31/50 



® 



/8088808880808000/8088808880808000/8088808880808000/8088808880808000/ 

@ 
/20A11080/1020B200/20001080/81000000/00000000/10101010/10101010/ 

(§) 
SPD1:0203040508090A0B0C0D0F101112131415161718191A1B1C1D1E1F202122235E 



29) 



DN:SPL9200007 SN:SPL9200010 



@ 



Example 


Meaning 


Description 


® [OAOO/0003] 


Mask ROM/Flash ROM 
on the engine board 


version 


- 


® [CI] 


Mask ROM version on the LCD 
controller board (Operator panel) 


- 


(D /•32.00 J 


Boot ROM version and DIMM 
type 


[32.00 ] or [32.00*] 

The last digit means DIMM type, 
the blank is flash type, and the 
asterisk ( *) is mask type. 


® n 7/05 J 


Internal use 


- 


(5) Total page 9690 


Total count page 


- 


®t/ 


Internal use 


- 



FS-1900 



B-5 



Example 


Meaning 


Description 


(7) POO/ 


Parallel interface mode 


bit 7= 0: No error with 

bidirectional communication, 

1: Error with bidirectional 

communication 

bit 6= 0: No ECP communication, 

1: ECP communication had 

occurred, at least once. 

bit to 5= History of printer 

parallel port directional 

communication. 

05= Nibble (High-speed), 07= 

ECP 


® /soo 


Serial interface error 


00= Noinial, bit 0= Framing error 
bit 1= Overrun, bit 2= Parity error 


(9) /FOO 


Operator panel lock (Shown only 
during locking) 


01= Partially locked 
02= Fully locked 


@ /NOO 


NVRAM error (Shown only if 
error has occurred) 


01= ID error, 02= Version error, 
03= Checksum error, 
04= NVRAM crash error 


@l /Dl : DM0301 . DAN 


NVRAM down loading status 


00= Normal (Nothing 
downloaded), bitO= Font data, 
bitl= host data, bit2= Macro data, 
bit3= Program data, bit4= 
Operator panel message 
download (shown file name), 
bit5= OEM data, bit6= Reserved, 
bit7= Error occurred 


@ /0020/0020 
/ 10 61/ 0811 


Printing area 


/Top margin/Left margin/Page 
length/Page width/ 


@/ 0/ 0/ 
/ 0/ 0/ 
/ 


Left margin offset for paper source 


/MP tray /Printer' s cassette/Top 
paper feeder/Middle feeder/ 
Bottom feeder/ Envelope feeder/ 
Duplexer 


@ /AAAAAA/AAAAAA 
/AAAAAA/AAAAAA 
/AAAAAA/ 


Life counter for the paper source 


/Top paper feeder/Middle feeder 
/Bottom feeder/Duplexer 
/Bulk paper feeder/ 


@ /J^J^J^J^J^/J^J^J^J^J^/ 


Life counter for the paper exit 
device 


/Bulk paper stacker/Sorter 


@/AAAAAA/ 


Life counter for the drum 


- 



FS-1900 



B-6 



Example 


Meaning 


Description 


@ /003D/0005/0005 
/0005/0005/0005 
/0005/0005 


Version for each unit 
(Hexadecimal) 


Drum unit/Top paper feeder/ 
Middle feeder/Bottom feeder/ 
Duplexer/Bulk paper feeder/Bulk 
paper stacker/Sorter 


@ /oooo/ 


EEPROM error for each unit 


bitO= Top paper feeder, 
bitl= Middle feeder, 
bit2= Bottom feeder, 
bit3= Duplexer, bit4= Sorter, 
bit5= Bulk paper feeder, 
bit6= Bulk paper stacker, 
bit7= Drum unit 


@ /RS2 


Serial interface mode 


RS2= RS-232C, RS4= RS422A 


@l /FF 


Drum sensitivity 


Hexadecimal (FRPO 14) 


@ / [0003-0003] 


Option unit equipment 


The first 2 byte: 

bitO= MP tray, bitl to 6= Paper 

feeder (5 and 6 are not supported.), 

bit7= Duplexer, bit8= Bulk paper 

feeder, bit9= Envelope feeder, 

bitlOto 15= Reserved. 

The second 2 byte: 

bitO =Face-up output tray, bitl= 

Face-down output tray, bit2= Bulk 

paper stacker. bit3= Sorter, bit4 to 

15= Reserved. 


(g) /AI . E 


Average print coverage (total) 


Two digits for integer part; one 
digit for decimal; unit is in percent 


^/l 


Operator panel message 
language 


PMSG command settings shown 
by decimal. 


@ /20 


Toner capacity 


Number of pages shown by 
decimal ( x 1000 pages) 


®/31 


The present temperature 


to 100 °C, When if "-" shows, 
the temperature/humidity sensor 
is abnormal. 


@/50 


The present humidity 


55 to 90 %, step by 5% 


@ /8088808880808000/. . . 


Engine parameter infoiniation 


Hexadecimal, 32 bytes (64 digits) 


(§) /20A11080/1020B200 
/20001080/81000000 
/OOOOOOOO/lOlOlOlO 
/ 10101010 


Media type settings 


Detailed media type settings 1 to 
28. (14 to 20 are reserved 
and fixed to setting "0x00". ) 


^SPD2: 02030405. . . 


SPD (slotl) 


- 


(§) DN:SPL92000007 


Serial number for the drum 


- 


@SN:SPL92000010 


Serial number for the printer 


- 



B-7 



FS-1900 



Appendix c I n t e r f 



Appendix C Contents 



Parallel interface C-3 

Selecting the parallel interface mode C-3 

Parallel interface pin assignment C-4 

Parallel interface signals C-5 

USB interface C-6 

USB interface pin assignment C-6 

Serial interface (option) C-7 

RS-232C interface voltage levels C-7 

Connector configurations C-7 

Protocol C-8 

RS-232C - For computers with a DB-9 connector C-8 

RS-232C - For computers with a DB-25 connector C-8 



Parallel interface 

The printer uses a bidirectional parallel interface for high-speed data transmission for the host 
computer. This interface includes the buffers which are compatible with the IEEE 1284 standards. 
The parallel interface provides support for the ECP and nibble modes in this standards. The parallel 
interface mode can be changed by commanding Prescribe commands on a PC. 

Selecting the parallel interface mode 

To change the parallel interface mode, a PC running MS-DOS is needed. Connect the printer to the 
PC via the parallel interface. Then, at the DOS prompt, type a FRPO OO (the letter O and the 
number zero) command as follows depending on the desired parallel mode: 



To set the parallel interface mode. 



Type at the DOS prompt... 



Normal 



echo !R! FPRO OO, 0; EXIT;>lptl 



High-speed 



echo !R! FPRO OO, 1; EXIT;>lptl: 



Nibble 



echo !R! FPRO OO, 5; EXIT;>lptl 



Automatic* 



echo !R! FPRO OO, 70; EXIT;>lptl: 



Factory-set default. 



FS-1900 
C-3 



Parallel interface pin assignment 

The pins of the parallel interface connector carry the signals listed below. The function for each 
signal is detailed on the following page. 




uuuuuuuuuuuuuuuuu 



nnnnnnnnnnnnnnnnnn 
36 19 




No. 


Terminal 


Signal 


No. 


Terminal 


Signal 


1 


nStrobe 


(STBINl/2*) 


19 


Ground 


GND 


2 


Datal 


(PADO) 


20 


Ground 


GND 


3 


Data2 


(PADl) 


21 


Ground 


GND 


4 


Data3 


(PAD2) 


22 


Ground 


GND 


5 


Data4 


(PAD3) 


23 


Ground 


GND 


6 


Data5 


(PAD4) 


24 


Ground 


GND 


7 


Data6 


(PADS) 


25 


Ground 


GND 


8 


Data7 


(PAD6) 


26 


Ground 


GND 


9 


Data8 


(PAD7) 


27 


Ground 


GND 


10 


nAck 


(ACKOUT) 


28 


Ground 


GND 


11 


Busy 


(BUSYOUT) 


29 


Ground 


GND 


12 


PError 


(PERROR) 


30 


Ground 


GND 


13 


Select 


(SELECT) 


31 


ninit 


(INIT*) 


14 


nAutoFd 


(AUTOFD*) 


32 


nFault 


(FAULT*) 


15 


Not defined 


NC 


33 


Not defined 


Pull-up (IkQ) 


16 


Logic ground 


GND 


34 


Not defined 


NC 


17 


Chassis ground 


GND 


35 


Not defined 


Pull-up (lk£2) 


18 


Peri-logic H 


(VCC) 


36 


nS elect In 


(SELECT!*) 



Maximum rated current for pin 18 is 500 
Pin 18 can not use pin 12 (-1-5 V) of serial 



mA (fused). 

connector RS-232C at the same time. 



FS-1900 



C-4 



Parallel interface signals 

The following table provides details for the signals used on the printer's parallel interface. Note 
descriptions in [ ] are for high-speed mode of the parallel interface. 



Signal 


Meaning 


Strobe* [nStrobe] (Pin 1) 


A negative-going Strobe* pulse causes the printer to read and latch 
the data on the Data [1] to Data 7 [8] signal lines. 


Data 0[1] to Data 7 [8] 
(Pins 2 to 9) 


These eight signals form the data byte sent from the host computer to 
the printer. Data 7 [8] is the most significant bit and Data [1] is the 
least significant bit. 


Acknowledge* [nAck] 
(Pin 10) 


This signal is returned to the host computer. This negative-going pulse 
acknowledges the previous character received by the printer. 
Acknowledge* pulses are sent only when Busy is low. 


Busy [Busy] (Pin 11) 


This signal is returned to the host computer. This signal is high when 
the printer is busy and low when it is able to accept more data. Every 
high-to-low transition is followed by an Acknowledge* pulse. 


Paper Empty [PError] 
(Pin 12) 


This signal is returned to the host computer. This signal goes high 
when the printer runs out of paper. 


On-Line [Select] (Pin 13) 


This signal is returned to the host computer. This signal is high when 
the printer is on-line and low when the printer is off-line. It goes low 
when the upper unit is raised, or when the GO key is pressed to set the 
printer off-line. 

Note: The Paper Empty and On-Line signals are not used unless enabled 
by the FRPO command (02 parameter). 


Auto-Feed [nAutoFd] 
(Pin 14) 


This signal is used in the Epson version of the Centronics interface to 
receive a carriage return. In high-speed mode, it is used as an interrupt. 


-1-5 V DC (pin 18) 


This hne is connected to the printer's -i-5 V DC hne (-1-5 V ±0.5 V, 500 
mA maximum, fused). 


Prime [ninit] (Pin 31) 


This signal is used in the standard Centronics interface to enable the 
computer to reset the printer. It is ignored by the printer. 


Error* [nFault] (Pin 32) 


When the high-speed parallel line control is on (FRPO 02 = 2), this 




line returns error status to the host computer. 


Auxiliary output 1 (Pin 33) 


This signal line is not used. 


Power Ready (Pin 35) 
Select In [NSelectIn] 
(Pin 36) 


This signal is high when the printer's power is on. 
This signal is used in some versions of the Centronics interface to 
enable the computer to force the printer on-line. In high-speed mode, 
it is used as an interrupt. 



FS-1900 



C-5 



USB interface 

This printer supports the USB (Universal Serial Bus) Revision 1.1 standards. USB interface 
specifications and interface signals are as follows: 



Item 


Specifications 


Basic specification 


Complies with the USB Revision 1.1 standards. 


Connectors 


Printer: B-type receptacle (female) with upstream port 
Cable: B-type plug (male) 


Cable 


Use shielded cable that complies with the USB Revision 1 . 1 standards and 
not longer than 5 meters (16 feet). 


Transfer mode 


Full speed (max. 12 Mbps) 


Power control 


Self-power device 



USB interface pin assignment 




Shell 



Pin No. 


Signal 


Description 


1 


Vbus 


Power supply (-1-5 V) 


2 


D- 


Data transmission 


3 


D-i- 


Data transmission 


4 


GND 


Signal ground Shell Shield 



Shell: Shield 



FS-1900 



C-6 



Serial interface (option) 

This printer is supported protocol of RS-232C serial interface, and printer is equipped a connector 
(YC5 (A)) on the main board for a serial interface. The printer is able to connect the computer 
through its RS-232C serial interface when optional serial interface board IB-lOE (b) is installed. 
The serial interface board IB-lOE has a 25-pin D-sub connector (c). serial interface specifications 
and interface signals are as follows: 




RS-232C interface voltage levels 

The voltage levels of the RS-232C signals conform to EIARS-232C specifications. FALSE is from 
3 volts to 15 volts. TRUE is from -3 volts to -15 volts. Voltages between -3 volts and 3 volts are 
undefined. 



Connector configurations 



Signal 


Meaning 


EG (Pin 1) 


This pin is connected directly to the printer frame. 


TxD (Pin 2) 


This output carries asynchronous data sent by the printer to the computer. 
It is used mainly in handshaking protocols. 


RxD (Pin 3) 


This input carries serial asynchronous data sent by the computer to the 
printer. 


RTS (Pin 4) 


This output is always held high (above 3 V). 


CTS (Pin 5) 


Unused. 


DSR (Pin 6) 


Unused. 


SG (Pin 7) 


All signals can transmit between the printer and the host computer to send 
each signals with a signal ground. 


DTR (Pin 20) 


This output is used as a buffer nearly-full handshake line. It is held high 
(above 3 V) when the buffer can accept more data. 





FS-1900 



C-7 



Protocol 

The serial interface supports the full baud rate of: 1200, 2400, 4800, 9600, and 19200, 38400, 
57600 and 1 15.2 k (bps). For adjusting serial interface parameters including baud rate, parity, etc., 
refer to printer's User's Manual. 

RS-232C - For computers with a DB-9 connector 



Computer 
serial port (DB-9) 



RXD 
TXD 
DTR 
GND 
DSR 
RTS 
CTS 




Serial interface 

board IB-10E 

connector (DB-25) 



TXD 

RXD 

RTS 

CTS 

DSR 

SG 

DTR 



RS-232C - For computers with a DB-25 connector 



Computer 
serial port (DB-25) 



GND 
TXD 
RXD 
RTS 
CTS 
DSR 
GND 
DTR 




Serial interface 

board IB-10E 

connector (DB-25) 



FG 

TXD 

RXD 

RTS 

CTS 

DSR 

SG 

DTR 



FS-1900 



C-8 



KYOCERA MITA EUROPE B.V. 

Hoeksteen 40, 2132 MS Hoofddorp, 

The Netherlands 

Phone: (020) 6540000 

Home page: http://www.kyoceramita-europe.com 

Email: info@kyoceramita-europe.com 

KYOCERA MITA NEDERLAND B.V. 

Hoeksteen 40, 2132 MS Hoofddorp, 
The Netherlands 
Phone: (020) 5877200 

KYOCERA MITA (UK) LIMITED 

8 Beacontree Plaza 
Gillette Way, 
Reading RG2 OBS UK 
Phone: (01 18) 931 1500 

KYOCERA MITA ITALIA S.P.A. 

Via Verdi 89/91 20063 Gernusco sul Naviglio 
(Milano) Italy 
Phone:02-92179 1 

S.A. KYOCERA MITA BELGIUM N.V. 

Hermesstraat 8A, 1930 Zaventem, Belgium 
Phone: (02) 7209270 

KYOCERA MITA FRANCE S.A. 

Pare les Algorithmes 

SAINT AUBIN 

91194GIF-SUR-YVETTE 

France 

Phone: (01) 69852600 

KYOCERA MITA ESPANA S.A. 

Edificio Mita, Avda. De Manacor N-2, 
Urb. Parque Rozas, Apartado de Correos 76, 
28230 Las Rozas, Madrid, Spain 
Phone: (91) 631-8392 

KYOCERA MITA FINLAND OY 

Kirvesmiehenkatu 4, 00810 Helsinki, 

Finland 

Phone: (09) 478-05200 

KYOCERA MITA (SCHWEIZ) AG 

Holzliwisen, Industriestrasse 28, 
8604 Volketswil, Switzerland 
Phone: (01) 908 4949 

KYOCERA MITA DEUTSCHLAND GMBH 

Mollsfeld 12 40670 Meerbusch, 

Germany 

Phone:02159-918120 

KYOCERA MITA GMBH AUSTRIA 

Eduard-Kittenberger-Gasse 95, 
1230, Wien, Austria 
Phone: (01) 86338-0 

KYOCERA MITA SVENSKA AB 

Siktgatan 2, 

162 50 Vallingby, Sweden 

Phone: (08) 4719999 



KYOCERA MITA DANMARK A/S 

Industrivej 1 1 , DK-4632 Bjaeverskov, 

Denmark 

Phone: 56871100 

KYOCERA MITA PORTUGAL LDA. 

GASGAISTOGK-Armazem n^8, 
Rua das Fisgas, Alcoitao, 
2765 Estoril, Portugal 
Phone: (21) 4602221 

KYOCERA MITA SOUTH AFRICA 

(PTY) LTD. 

UNIT 3, "Kyalami Grescent," 
Kyalami Business Park, 
1685 Midrand, South Africa 
Phone: (11) 466-3290 

KYOCERA MITA 
AMERICA, INC. 

Headquarters: 

225 Sand Road, P.O. Box 40008, 

Fairfield, New Jersey 07004-0008, 

U.S.A. 

Phone: (973) 808-8444 

KYOCERA MITA AUSTRALIA PTY. 
LTD. 

Level 3, 6-10 Talavera Road, North Ryde, 
N.S.W. 21 13 Australia 
Phone: (02) 9888-9999 

KYOCERA MITA NEW ZEALAND LTD. 

1-3 Parkhead Place, 
Albany, Auckland, 
New Zealand 
Phone: (09) 415-4517 

KYOCERA MITA (THAILAND) CORP., 
LTD. 

9/209 Ratchada-Prachachem Road, 
Bang Sue, Bangkok 10800, Thailand 
Phone: (02) 586-0320 

KYOCERA MITA SINGAPORE 
PTE LTD. 

121 Genting Lane, 3rd Level, 
Singapore 349572 
Phone: (65) 7418733 

KYOCERA MITA HONG KONG 
LIMITED 

11/F., MitaGentre, 
552-566, Gastle Peak Road, 
Tsuen Wan, New Territories, 
Hong Kong 
Phone: (852) 24297422 

KYOCERA MITA 
CORPORATION 

2-28, 1-chome, Tamatsukuri, Ghuo-ku 
Osaka 540-8585, Japan 
Phone: (06) 6764-3555 



KYOCERA MITA AMERICA, INC. 



Headquarters: 

225 Sand Road, P.O. Box 40008 
Fairfield, New Jersey 07004-0008 
TEL : (973) 808-8444 
FAX : (973) 882-6000 

New York Show Room: 

149 West 51st street. 
New York, NY 10019 
TEL : (212) 554-2679 
FAX: (212) 554-2625 

Northeastern Region: 

225 Sand Road, P.O. Box 40008 
Fairfield, New Jersey 07004-0008 
TEL : (973) 808-8444 
FAX : (973) 882-4401 

Midwestern Region: 

201 Hansen Court Suite 1 1 9 
Wood Dale, Illinois 60179 
TEL : (630) 238-9982 
FAX : (630) 238-9487 



Western Region: 

14101 Alton Parkway, 
Irvine, California 92618-7006 
TEL : (949) 457-9000 
FAX: (949) 457-91 19 

Southeastern Region: 

1500 Oakbrook Drive, 
Norcross, Georgia 30093 
TEL : (770) 729-9786 
FAX : (770) 729-9873 

Southwestern Region: 

2825 West Story Road, 
Irving, Texas 75038-5299 
TEL : (972) 550-8987 
FAX : (972) 570-4704 

Dallas Parts Distribution Center 
& National Training Center: 

2825 West Story Road, 
Irving, Texas 75038-5299 
TEL : (972) 659-0055 
FAX: (972) 570-5816 



KYOCERA MITA CANADA, LTD. 

6120 Kestrel Road, Mississauga, 
Ontario L5T1S8, Canada 
TEL : (905) 670-4425 
FAX: (905) 670-81 16 



KYOCERA MITA MEXICO, S.A. DE C.V. 

Av. 16 de Septiembre #407 
Col. Santa Ines, 
02130 Azcapotzaico 
Mexico, D.F. Mexico 
TEL : (5) 383-2741 
FAX : (5) 383-7804 



©2001 KYOCERA MITA CORPORATION 

^K!dDCER3 is a trademark of Kyocera Corporation 

mita is a registered trademark of KYOCERA MITA CORPORATION